Saturday, June 12, 2010

MainosMemos New Design

As you can see....I've changed the design of the blog. I like it because of the high contrast making it easier to read....what do you think? DM

Identification of Binocular Vision Dysfunction (Vertical Heterophoria) in Traumatic Brain Injury Patients and Effects of Prismatic Glasses

Jennifer E. Doble, MDa, Debby L. Feinberg, ODb, Mark S. Rosner, MDcCorresponding Author Informationemail address, Arthur J. Rosner, MDd Identification of Binocular Vision Dysfunction (Vertical Heterophoria) in Traumatic Brain Injury Patients and Effects of Individualized Prismatic Spectacle Lenses in the Treatment of Postconcussive Symptoms: A Retrospective Analysis Volume 2, Issue 4, Pages 244-253 (April 2010)

Vertical heterophoria was identified in a group of TBI patients with postconcussive symptoms and treatment of the vertical heterophoria with individualized prismatic spectacle lenses resulted in a 71.8% decrease in subjective symptom burden and a relative reduction in VHS-Q score of 48.1%. It appears that vertical heterophoria can be acquired from TBI.

Also see

Comments: I am in the process of obtaining this article so I can read it beginning to end. I am always astounded when ophthalmology "discovers" something optometry has known about for decades. However, this group of authors includes one optometrist...who does reference the optometric literature...for instance the theme issue on TBI recently published in Optometry & Vision Development (which is easily accessible since it is an open access journal). I encouraged OMDs to open your eyes....look beyond your usually limited gaze....and see what optometry has contributed to the just might be surprised! This may be a start! DM

Thursday, June 10, 2010

DMM Scope of Practice Data Series: Ophthalmology

DMM Scope of Practice Data Series: Ophthalmology
A resource compendium for all optometric associations, optometric specialty societies, third party payers, insurance companies and the new US Health Care Program. Ophthalmologist DMM April 2010.

Maino D. DMM scope of practice data series: ophthalmology. Optom Vis Dev 2010;41(2):66-69.

[Homework: In order to more fully appreciate this editorial, I am recommending that you read the American Medical Association’s Scope of Practice Data Series for Optometrists first. This can be found at This homework assignment is completely optional. You only need to read the first 10-12 pages of the AMA’s publication to fully come to appreciate the incredible satirical heights achieved within this editorial while expressing just the right amount of indignant outrage. DM ].....

Comments: If you are a health care provider, read this. If you are a consumer of health care, read this. Despite saying otherwise, organized medicine wants to define your profession....and by doing so potentially limit the services you provide. Read this now. DM

Eye-movement patterns of readers with down syndrome during sentence-processing: an exploratory study.

Frenck-Mestre C, Zardan N, Colas A, Ghio A.Eye-movement patterns of readers with down syndrome during sentence-processing: an exploratory study.Am J Intellect Dev Disabil. 2010 May;115(3):193-206.

Eye movements were examined to determine how readers with Down syndrome process sentences online. Participants were 9 individuals with Down syndrome ranging in reading level from Grades 1 to 3 and a reading-level-matched control group. For syntactically simple sentences, the pattern of reading times was similar for the two groups, with longer reading times found at sentence end. This "wrap-up" effect was also found in the first reading of more complex sentences for the control group, whereas it only emerged later for the readers with Down syndrome. Our results provide evidence that eye movements can be used to investigate reading in individuals with Down syndrome and underline the need for future studies.

Teacher/Parent Packet

The Vision Therapy Center, Inc...did a nice job in putting together this info for parents and teachers....DM

Stereoacuity Outcomes Following Treatment of Infantile and Accommodative Esotropia

...Some abnormalities in stereoacuity may exist before the onset of esotropia, but others may result directly from abnormal binocular experience. Several strategies for improving stereoacuity outcomes in esotropia are currently under active investigation. Improved stereoacuity outcomes are associated with better long term stability of alignment, reduced risk for and/or severity of amblyopia, improved achievement of sensorimotor developmental milestones, better reading ability, and improved long-term quality of life....

Comments:So if improved stereoacuity outcomes are associated with better long term stability of alignment, reduced risk for and/or severity of amblyopia, improved achievement of sensorimotor developmental milestones, better reading ability, and improved long-term quality of life, why do ophthalmic surgeons only want the eyes straight? How about doing something to improve sensori-processing? You optometric vision therapy? Read full article by clicking title. DM

Outcome of monocular surgery for horizontal strabismus in Hyderabad

Junejo SA, Ansari MA.Outcome of monocular surgery for horizontal strabismus in Hyderabad. Clin Ophthalmol. 2010 Apr 26;4:269-73.

.... After squint surgery, patients in group 1 (79%) and in group 2 (73.3%) had residual deviation of less than 15 prism diopters (PD). ...

Comments: So ... if I'm reading this correctly 20 to about 30% had residual strabismus after surgery GREATER than 15 prism diopters? This is successful? When you want the eyes straight....and there is still 15 prism diopters of eye turn...they consider this successful? Ahhh no. Success should be measured as straight eyes with good randot stereo .... I'm curious if any patients achieved this?DM

Summer Plans for Children With ADHD

...How one working mother helps her son with ADHD stay active, engaged, and safe during the long summer months....

Hope For Simple Urine Test For Autism

...Children with autism have a different chemical fingerprint in their urine than non-autistic children....their findings could ultimately lead to a simple urine test to determine whether or not a young child has autism. ...

Link Between ADHD, Low Maternal Education, Lone Parents And Welfare Benefits

...A major study of more than a million children has found strong links between receiving medication for attention deficit hyperactivity disorder (ADHD) and limited maternal education, single parent families and welfare benefits, according to the June issue of Acta Paediatrica...

DNA Losses, Gains Play Role in Autism Disorders

...Researchers think they have found some of the edge pieces in the jigsaw puzzle that is autism spectrum disorder....researchers has found that insertions and deletions of DNA in a host of genes play a role in the disorders....What's more, very few people with autism and related conditions have exactly the same set of insertions and deletions....The results "substantiate the importance of genes as susceptibility factors in autism,...

Inappropriate Use Of Hand-Held Laser Pointers May Cause Serious Eye Damage.

Inappropriate Use Of Hand-Held Laser Pointers May Cause Serious Eye Damage.
BBC News (6/9) reported that, according to a case study published in the British Medical Journal, "hand-held laser pointers can cause serious eye damage if used inappropriately." Doctors from the UK's "Royal Liverpool Hospital and Manchester Eye Hospital spoke out after treating a teenager who had shone a" green diode "laser into his eyes." The boy, who "suffered burns and retinal damage," had "central scotomas, or dark spots, in his vision." Although the young man eventually recovered, doctors say he faces an increased risk of future vision problems as a result of the damage done to his retinas.

Wednesday, June 9, 2010

Leone d'Oro™ Wines Now Available!

Comment: I like wine and am a member of The Sons of I thought I'd share this with you. DM

The Sons of Italy, through its licensing corporation Figli d'Italia, has launched a line of imported Italian wines, called Leone D'Oro™ (Golden Lion). The Sangiovese and Gavi were premiered at the Sons of Italy Foundation's NELA Gala on May 26.

Developed with licensing partner Votto Vines Importing, the red, white and sparkling varietals from the regions of Piemonte, Friuli, Le Marche and Toscana are available now through Dotcomwines, with more retailers to be added soon.

The wines are also available through an expanding network of national wholesalers.

For more information on Leone d'Oro, including how to become a distributing partner, please contact Votto Vines.

Association for Education and Rehabilitation of the Blind and Visually Impaired

General Session Speakers Announced

Register by July 2 at
and take advantage of lower rates.

The Association for Education and Rehabilitation of the Blind and Visually Impaired (AER) is pleased to announce that Kathleen Martinez, Assistant Secretary of Labor for Disability Employment Policy, will address the AER International Conference 2010 at the July 22 general session in Little Rock, Ark. As head of the U.S. Department of Labor's Office of Disability Employment Policy (ODEP), Ms. Martinez advises the Secretary of Labor and works with all DOL agencies to lead a comprehensive and coordinated U.S. policy regarding the employment of people with disabilities.

Also on tap for a general session is an in-depth panel discussion on "Teamwork: Meeting Multiple, Diverse Needs by Sharing and Learning," set for July 23. The session will focus on how vision professionals and occupational therapists can share with and learn from each other when they work together on diagnostic and prescriptive teams for children and adults. Expert panelists include Tanni Anthony, Colorado Dept. of Education; Jessica Lampert, Dallas Independent School District; Patricia Smith, University of Arkansas at Little Rock; and Orli Weisser-Pike, Hamilton Eye Institute.

"Working with the Blind and Visually Impaired: An International Perspective" will feature international panelists discussing work being accomplished with youth and adults in the United Kingdom, Pacific Islands, India, and Australia and U.S. panelists talking about getting involved in international services. Prestigious participants include: Philippa Simpkiss, Royal National Institute for the Blind; June De Leon, University of Guam; Rajesh Singh, India's Bhoj Open University; Carolyn Palmer, Finders University of South Australia; Nora Griffin-Shirley, Texas Tech University at Lubbock; and Donna McNear, Independent Educational Consultant. Karen Wolffe will facilitate the dialogue, scheduled for July 24.

The Pre-Conference MacFarland Seminar will address "Brain Injury and Vision Loss: Medical Insights into our New Challenge" on July 21. The in-depth, day-long seminar will investigate the impact of head injury on vision loss.

Leading the list of esteemed speakers is Dr. Ann McKee, Associate Professor of Neurology and Pathology at Boston University School of Medicine and Director of the Neuropathology Service of the New England Veterans Administration Medial Center, who will discuss the anatomical and behavioral changes associated with acquired brain injury (ABI). Allison Hayes, co-founder of Neuro Vision Technology in Australia, will talk about specific effects of brain injury on visual function in adults and suggest treatment approaches that may ameliorate the impact of the disease. Dr. Lea Hyvarinen, a world-renowned pediatric ophthalmologist based in Finland, will conclude the medical presentation by addressing ABI in children, ranging from cortical visual impairment to concussions and other head trauma. The seminar ends with a panel discussion about the impact of ABI on a daily basis.

The MacFarland Seminar, sponsored by Lions World Services for the Blind and the National Center on Severe & Sensory Disabilities at the University of Northern Colorado, requires a separate registration fee in addition to conference registration.

Additional information -

Hurry. Register by July 2 for lower rates.

Infection Prevention a Problem in Some Medical Facilities

... Infection control strategies in nearly 70 ambulatory surgical centers were not up to par, according to a new study....Researchers defined "ambulatory surgical centers" as facilities that operate solely to provide surgical services to patients who do not need hospitalization or stays in a surgical facility longer than 24 hours. In 2007, these centers performed more than 6 million procedures....

Comments: Wash your hands, Wash your hands, Wash your hands...did I mention...Wash? DM

Special Rememberance: Dr. John W. Streff June 2, 1926 - May 6, 2010

Marlys & John Streff

COVD Remembers John Streff

Dr. John W. Streff passed away on May 6, 2010 at the age of 83. As a 1950 graduate of the Chicago College of Optometry, John was a founding father of the developmental optometry community. His long career included a private practice in Pipestone, Minnesota; Director of Vision Research at the Gesell Institute of Child Development (presently Yale University's Gesell Institute of Human Development); Professor of Pediatric Optometry and Vision Therapy at the Southern College of Optometry; Director of Optometry at the Skeffington/Alexander National Optometry & Education Learning Research Center (SA NOEL); and a private practice in Lancaster, Ohio with his son, Dean.

After John retired from clinical practice, he continued to lecture and write articles for professional journals. John authored and co-authored approximately 40 professional papers and books. He has been a leading proponent in advancing the recognition of vision therapy, and has been recognized with numerous awards and honors for his work. COVD awarded John the Robert and Margery Wold Heritage Award, the A.M. Skeffington Award, the G.N. Getman Award, and the OVD Award for Best Article.

Memorial donations may be given to Parents Active for Vision Education (P.A.V.E.), 4135 54th Place, San Diego, California 92105. Visit the P.A.V.E website for more information on donating.

John W. Streff Scholarship

Today, June 2nd, our friend and colleague John W. Streff, OD, DOS, FAAO, FCOVD would have been 84. Instead of celebrating with him, we are paying tribute to him by recognizing his contributions to us as friends and to our profession of optometry. A scholarship will be created in his name to be awarded to at least one optometry student annually. John loved to teach both optometrists and optometry students. He would have been honored to know that through this scholarship his ideas will continue to be passed on from generation to generation.

To make a pledge for the John W. Streff Scholarship fund please send your name, address, e-mail, telephone number and amount of pledge to Dr. Kellye Knueppel, (262) 784-9201. Dr. Knueppel will contact you soon to let you know where to send your pledge as soon as the fund is set up correctly with non-profit status.

A benefit seminar to kick off the scholarship will be held in the summer of 2011. This one-of-a-kind seminar will feature the ideas John presented to the Lens Symposium (ILS) and study groups over the past 20+ years. Presentations will be based on John's papers and talks. Speakers will be several different ILS members and study group participants. All proceeds will be donated to the scholarship fund. More information coming soon.

Tributes to John

"Dr. John Streff was an icon in our profession. Yet, John was a very humble man. Even his second wife, Marlys, had no idea of his fame and following until she accompanied him to several lectures. John had a very unique and accurate perspective of how our visual system truly worked. He patiently and tirelessly worked with our Super Bowl Study Group and the Invitational Lens Symposium year after year, embracing new members as our groups steadily grew, to share his passion for behavioral optometry and the appropriate use of lenses, filters, and prisms to better serve the needs of our patients. We can honor John by ensuring that his work continues through the sharing of his knowledge and insights with others in our profession, especially the new ODs. John was truly every ODs father and grandfather. He will be greatly missed." Dr. Mary VanHoy, Carmel, Indiana

"I first met John Streff as a resident at SCO when I spent a few days at the SA NOEL Center. He was wonderful with the children and had such a rapport with people. He graciously invited me to come to his house for dinner. He was always willing to spend extra time with students and talk. He fixed his famous spaghetti, and we visited his wine cellar to pick out a few bottles of zinfandel. I certainly didn't follow a lot of what he told me then but it sure did make me think hard. He usually answered a question with a question that would help you come up with an answer. This started a long friendship and mentoring that lasted 27 years. Fondly known as the "spaceman," he helped me understand the power of lenses and how they change perception and projection. His stories of his experiences with Dr. Gesell and Dr. Skeffington made history come alive. In the last few years, John emphasized the importance of understanding vision development in order to help all our patients. Every time I heard him lecture or had the opportunity to talk to him about my patients, I came away a better optometrist who understood more about vision. I know many others had the same experience. John never retired from thinking about vision development and sharing his knowledge with others. John was one of the great developmental optometrists, and I will miss him personally and professionally, as many of us will." Dr. Carol Scott, Springfield, Missouri

"I first met John in Memphis, TN when he came to teach. A few of us went to help John in his new house and we painted his dining room. I was further introduced to him in clinic rotation and my first experience with a "Streff Syndrome", a 9 year old boy. I had not a clue what to do but, John was there to help me and this child improve. I will remember John for his kindness to patients and colleagues. He could help his patients understand their vision problem and help them explore ways to improve. John was a great example of humanity and will be remembered each time I see a patient that has visual problems or complaints that don't fit the routine "model". John had a way of helping us continue to ask and discover more about our greatest gift, vision." Dr. Mike Frier, El Dorado Springs, Missouri

"John has left us with much to remember. I wonder how many knew of his special talents not related to optometry? John was good at making things. This not only included VT instruments but also detailed birdhouses for his friends. He also was an avid coin collector. Once when visiting he gave my son a coin as a thank you for using Andrew's bedroom to stay in. Besides craftsman and coin collector John enjoyed wine. I understand he had a nice collection. It was a treat to be invited into the wine room. Multi-faceted in talent he was also multi-faceted in thinking. Many had asked him a question, received a supposed simple answer only to later not be able to repeat the answer to another who had heard the same answer. I remember a simple answer that has led many to expand their model of vision. Once when walking down the street with Dick Apell, John commented that the photosensitivity from the glare of the store window could be decreased if you changed how you looked at it. He said to look at it as if it were a mirror instead of a window. This led us to many lengthy discussions on spatial projection and perception. John's explanation was that photosensitivity was light information that can be neither organized nor ignored. John understood it was all about how one looked that influenced how to see. Some of John's best shared ideas were when I called him with a question or he called me. I always tried to write everything down so I could go back later and think about what he was saying. When he was on a roll one could only imagine what new thoughts he might come up with. He always worked to expand his model of vision. Even the last study group in February 2010 found him coming up with new information about vision training techniques. So when we listened well and studied hard we could gain a little understanding and our models would also grow. He always stayed ahead of us though so it seemed we could never catch up. Every time we digested his latest paper he would come up with a new one. I guess now he has given us a chance to catch up. A great man a wonderful caring friend. I miss him every time I see a patient. I miss him when I am driving home after being in the office and I miss him when going over his words of wisdom. It is a great loss for me and for optometry. I am thankful he left us with so much yet sad that there will be no more." Dr. Brenda Heinke Montecalvo, Dayton, Ohio

"Optometry has lost a great person in John Streff. It would be difficult to really share and demonstrate how much he meant to so many. He was a husband, a family man, a community man, a teacher, a clinician and certainly a good friend to all. Those that crossed his path were fortunate to see the passion he had for not only what we do, but for every second of life itself. That was the beginning of his many gifts to us all, it was contagious and set the stage for us in all our endeavors with him. Learning about vision with John was a passionate experience that no one will ever forget. He will certainly always be with us in spirit. Whether it be looking through your retinoscope or investigating the use of lenses/prisms, he has influenced many of us. We are truly blessed he chose Optometry as a profession because he made our profession better. In the many years I knew John, I felt honored and fortunate to be able to be one of the many colleagues who had an opportunity to absorb so much from his meetings or simply during a personal phone call. He always had a unique way of never directly answering a question, probably as he knew it was only part of our journey as a profession. Instead, he would respond by taking the question into a further query. The discussion that ensued would always come to more questions, but most importantly... a better understanding for all. His laughter and smile will be missed, but his presence will always be felt for the great person he was." Dr. Curtis R. Baxstrom, Federal Way, Washington

Comments: Dr. Streff was an amazing individual...he was not only a pioneer in the field of behavioral optometry....but always a persistent, unfailing proponent of the tenets of functional optometry. He never wavered over the years. He was steadfast in his beliefs that functional optometry could help millions of individuals improve their quality of life....academic performance...sports performance and more...he has made a difference. He has shown many how to lead a life that many of us should try to emulate. He will be missed. DM

Tuesday, June 8, 2010

Stereoscopic for Dummies

..Confused about the technicalities of this hot Hollywood trend? Just how do they create those "wonderful movies where stuff comes out of the screen at you"? Like a pack of dummies, we sit in the theatre grasping at thin air, attempting to brush aside the foliage of Pandora's lush rainforests, or perhaps in the hope that Alice, trapped in her nightmarish wonderland, might somehow be rescued back into reality by our loving touch. Then again maybe that's just me? If you are at all curious as to how the magic of stereoscopic 3D works, yet hesitant to approach the subject for fear of finding yourself caught in a maelstrom of indecipherable geek speak, allow me then the privilege of explaining this curiosity using the simplest terms available to man:

The Difference in Having Two Eyes...

Comments: Pretty good description of stereo and why having two eyes that work well together is so important. DM

The Game Changer: Playstation Goes 3D

...As the movie debate rolls on, the videogame industry has been quietly embracing the third dimension with millions of dollars being poured into research and development in order to add more depth to an already immersive medium. This month the first fruit of this labour will be tested as the Playstation goes 3D....

Comments: How many 3D gamers will show 3D Vision Syndrome? DM

Tools for 3-D viewing have evolved for years

...people can see in three dimensions because of parallax. Our two eyes give the brain two slightly different viewing angles that it combines to produce depth....It means that we can use flat images to produce the illusion of depth, whether it be the overlapping images of a sequence of air photos to study the topography of Earth and other planets, the use of computers in 3-D visualization for design and modeling, 3-D movies at the theater or 3-D television on the horizon.....

Abstract Submission Deadline is this Friday, June 11

COVD is soliciting abstracts for papers and posters to be presented at the COVD 40th Annual Meeting. Any person wishing to make a presentation is invited to submit a proposal.

All abstracts will be reviewed by the Research Committee and will be judged on the basis of overall quality, completion of required information, relevance to behavioral and functional vision, subject matter, innovation, and attention to key questions in the field. Proposals may include research results, case studies, or new and innovative diagnostic procedures or treatment techniques.

Abstract Submission Application

Abstract Submission Guidelines

Deadline for abstract submission is June 11, 2010.

Sunday, June 6, 2010

Optometry and Vision Development Volume 41, No. 2, 2010 Now Online!

Optometry and Vision Development Volume 41, No. 2, 2010 Now available online!

DMM Scope of Practice Data Series: Ophthalmology
by Dominick M. Maino, OD, MEd, FAAO, FCOVD-A, Editor

Optometric Vision Therapy: More Than Meets the Eye
by Susan R. Barry, PhD

Letter to the Editor

In Memoriam: John Streff

Frequency and Types of Pediatric Symptoms in a Clinical Population
by W.C. Maples, OD, MS, FAAO, FACBO, FCOVD

From Braille to Quilting: A Neuro-Optometric Rehabilitation Case Report
by Kauser Sharieff, OD, FCOVD, FNORA

Literature Review
Current Eye & Vision Science Literature
Review by David A. Goss, OD, PhD, FAAO, FCOVD-A

Book Review
Review by Christine L. Allison, OD, FAAO, FCOVD

Practice Management
Social Digital Media - A New and Powerful Way to Educate Your Patients about Optometric Vision Therapy
by Nathan Bonilla-Warford, OD, FAAO

Staff Problems: Proficiency or Attitude
by Mark R. Wright, OD, FCOVD

Doctor-Staff Relations: Don’t Underestimate the Power of “Hello”
by Toni Bristol

Dispelling Two Pernicious Myths About Optometric Vision Therapy
by Thomas Lecoq, Amee Lecoq


The 3Ds of Stereoscopic 3D Viewing Problems: Parts I, II, II, IV, V

Comments: My friend and colleague, Dr. Len Press, wrote this series of articles on his Vision Help Blog. They are fascinating, especially if you are having difficulties with the new 3D technology and are suffering from 3D Vision Syndrome. Read these now and enjoy, learn. DM

Part I
The 3Ds of Stereoscopic 3D Viewing Problems: An Introduction
There are three principal “Ds” of stereoscopic 3D viewing problems:

* Discomfort
* Dizziness
* Lack of Depth ...

Part II
The 3Ds of Stereoscopic 3D Viewing Problems: Part 2

Mark Schubin is a blogger with a really good feel for issues presented by 3D stereoscopic viewing. Here’s a particularly good cafe item:

Schubin cites a November 2009 report from PricewaterhouseCoopers (PwC), “Eyes Wide Open: 3D Tipping Points Loom.” The report notes that the top two factors that could limit adoption of 3D technology are that approximately 20% of the people who attended a 3D movie didn’t like the experience, citing issues such as eye fatigue and discomfort of the eyeglasses, and about 5% of people are ’stereoblind’. ...

Part III
The 3Ds of Stereoscopic 3D Viewing Problems: Part 3

Bernard Mendiburu isn’t a household name. That’s okay, neither you nor I stir instant name recognition in most households, but we’ve done okay for ourselves. Of what relevance is Mendiburu to stereoscopic media? Quite a great deal, actually - and he’s managed to put his experience to good use in a marvelous book published last year by Elsevier....

Part 4
The 3Ds of Stereoscopic 3D Viewing Problems: Part 4

No, that’s not a smirk on the face of Bernard Mendiburu. It’s the look of a man who, in his book described in some detail below, has made a profound observation. In a section entitled “3D increases the visual system workload”, Mendiburu boldly predicts that going from flat movies to 3D will trigger an extension of the range of stimuli on a par with what sound added to cinema. ... It really is profound to think that 3D done well isn’t visual icing on the cake, but an entirely new sensory experience akin to the what the talkies did to silent movies.

While this can be a delightful experience for many, there are those for whom the increase in visual system workload while watching TV or movies is too much to sustain. ....

Part 5
The 3Ds of Stereoscopic 3D Viewing Problems: Part 5/Final

Why is this man smiling? It may be because he has one of the best jobs in the world, at least through my eyes. Phil Lelyveld manages the Consumer 3D Experience Lab at USC film school’s Entertainment Technology Center. The Lab, which is funded in part by the CTOs of the six major Hollywood studios, addresses stereoscopic 3D in the home, on personal devices, in public spaces, in advertising, and in theatres.

Mr. Lelyveld has turned his attention to health aspects of stereoscopic 3D vision (S3D). His executive briefing on the subject is well worth reading:

Equally informative is his presentation on S3D as an intersection of art, technology and the human visual system.

Among Levlyeld’s many observations is the following: “Consumers don’t buy technology, they buy the experiences that technology delivers”. That brings to mind an insight from Bernard Mendiburu, who attributes it to Josh Greer: “Stereopsis is more like a feeling than a perception“.....

Read more by clicking on each title. DM