- Clinical optometrist for over 30 years in Toronto Canada.
- Chief of Low Vision, The Vision Institute of Canada
- Founder of the Scarborough Low Vision Centre.
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Adjunct Associate Research Professor University of Waterloo
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Area of Research Amplyopia
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Area of specialty: Binocular Ophthalmic Optics
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Chief Scientists and founder at Shaw Lens
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Inventor of an improved Spectacle Lens Design Method
Presentation:
- CVE 2 – PowerPoint
- Shaw CVE 2 – PDF
So what does this have to do with behavioral optometry? Well, lots, and I love to talk about it. Send me your questions in advance of CVE2015!
Read:Binocular parameters in spectacle correction of anisometropic amblyopia.
Presentation Content.
- How I see binocular vision ,
- Two pillars: sensory fusion and motor fusion
- Static aniseikonia: presents and obstacle to sensory fusion
- Dynamic aniseikonia; presents an obstacle to motor fusion
Poorly or randomly (lab) designed lenses may be creating optical aniseikonia and optical anisophoria
- iseikonic/Isophoric spectacle lenses create the foundation upon which the two pillars can stand upright.
- Iseikonic vs Isogonal, an isogonal lens system has the iseikonic prescription at 0% static. An iseikonic Rx is whatever it is that eliminates static aniseikonia. Contact lenses are isogonal.
Determination of the iseikonic Rx from history and clinical findings without a space eikonometer.
- Automated ophthalmic lens design software,
Application in the real world
- The robust binocular vision patient, fused in all gaze positions and distances , stereo acuity exceeds 20″, no suppression, absence of amblyopia, fast vergence facility and adequate amplitudes . With eyeglasses on.
- The fragile binocular vision patient hallmarks include: suppression scotoma, stereopsis less than 20″, reduced visual acuity, discomfort, fixation disparity in non centered or centered gaze, non-concomitancy etc.
- Lens design by diagnosis
Case Studies
- Amblyopia
- Anisometropia secondary to cataract/surgery or refractive surgery
- Maculopathy
- Scleral Buckle
- Additional Business Notes for Clinical Practice