Saturday, September 1, 2012

VHP: Binocular Vision, 3D Vision at AOA and Stereopsis with Dr. Sue Barry


This episode of the Vision Help Podcast focuses on binocular vision.  Vision Help Blogger, Dr. Leonard Press, joins the program to discuss this years American Optometric Association (AOA) and presentations regarding 3D technologies and binocular vision.  We are also joined by Dr. Sue Barry, a professor of Neurobiology and author of the book, Fixing My Gaze a Scientist's Journey into Seeing in Three Dimensions.  In the interview, Dr. Barry discusses her history with Strabismus and how, through vision therapy, she was able to achieve stereopsis as an adult.
 Also see the following:

Friday, August 31, 2012

Association between reading speed, cycloplegic refractive error, and oculomotor function in reading disabled children versus controls.

Association between reading speed, cycloplegic refractive error, and oculomotor function in reading disabled children versus controls.

 ....Approximately one in ten students aged 6 to 16 in Ontario (Canada) school boards have an individual education plan (IEP) in place due to various learning disabilities, many of which are specific to reading difficulties.... This study evaluated one 100 patients 50 IEP and 50 controls, age range 6 to 16 including full binocular vision work-up and cycloplegic refraction. Both groups were also examined using the Visagraph I. The researchers noted that the IEP group had significantly greater hyperopia compared to the control group and that vergence facility was significantly correlated to (i) reading speed, (ii) number of eye movements made when reading, and (iii) a standardized symptom scoring system. Vergence facility was also significantly reduced in the IEP group. Other significant differences in several binocular vision related scores were also found. They concluded that reading speed, refractive error, and vergence facility problems were associated with the IEP group. Students with an IEP should have a full eye examination (including cycloplegia), in addition to a comprehensive binocular vision evaluation.

Comments: I am proud to note that the primary author of this paper, Dr. Patrick Quaid,  which is published ahead of the print edition in Graefes Archives of Clinical and Experimental Ophthalmology, is both friend and colleague. He is a Fellow of the College of Optometrists in Vision Development, on the Journal Review Board of  Optometry & Vision Development, in private practice and affiliated with the School of Optometry University of Waterloo in Canada. He is also not only an expert in pediatrics/binocular vision/optometric vision therapy...but is a leading researcher in glaucoma (which is an interesting combination until you realize that glaucoma significantly affects vision function).

He and his colleague, Dr. Trefford Simpson, have clearly demonstrated the need for a comprehensive eye and binocular vision assessments of all children with learning difficulties. Our American opthalmological colleagues can no longer assert that vision has nothing to do with learning....that vision has nothing to do with reading....because there is a growing body of evidence to strongly suggest otherwise....if they but seek it out and read it.

If you have a child that struggles in school, please have their visual system assessed immediately. Go to the College of Optometrists in Vision Development to find such a doctor.

If you live in the Chicago-land area, seek out assistance from the Illinois Eye Institute Pediatrics/Binocular Vision Service (where I tend to spend most of my time) or Lyons Family Eye Care (where I also spend a day a week) if you are looking for a private practice setting.

 Click here for more information.

Reference: Quaid P, Simpson T.Association between reading speed, cycloplegic refractive error, and oculomotor function in reading disabled children versus controls.Graefes Arch Clin Exp Ophthalmol. 2012 Aug 29. [Epub ahead of print]

Glaucoma articles by Dr. Quaid:
Quaid PT, Flanagan JG. Vision Res. 2005 Apr;45(8):1075-84. Epub 2004 Nov 30.
Frequency doubling illusion: detection vs. form resolution.Quaid PT, Simpson TL, Flanagan JG.Optom Vis Sci. 2005 Jan;82(1):36-42.

Monocular and dichoptic masking effects on the frequency doubling illusion.Quaid PT, Simpson T, Flanagan JG.Vision Res. 2004 Mar;44(7):661-7.