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Educational Ophthalmology Surgical Videos and Ophthalmology Examination Videos
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Hirschberg Test – Squint Video

Hirschberg Test - Squint Video

Hirschberg Test – Squint Video Technique It is performed by shining a light in the person’s eyes and observing where the light reflects off the corneas. In a person with normal ocular alignment the light reflex lies slightly nasal from the center of the cornea (approximately 11 prism diopters — or 0.5mm from the pupillary axis), as a result of ... Read More »

Squint Cover Tests Video

Squint Cover Tests Video

Squint Cover Tests Video A cover test or cover-uncover test is an objective determination of the presence and amount of ocular deviation. It is typically performed by orthoptists, ophthalmologists andoptometrists during eye examinations. The two primary types of cover tests are: the alternating cover test the unilateral cover test (or the cover-uncover test). The test involves having the child (typically) ... Read More »

Krimsky Test and Modified Krimsky Test Video

Krimsky Test and Modified Krimsky Test Video

Krimsky Test and Modified Krimsky Test Video The Krimsky test is essentially the Hirschberg test, but with prisms employed to quantitate deviation. The Krimsky test is advisably used for patients with tropias, but not with phorias. This video demonstrates the use of the Krimsky Test to measure strabismus when one eye does not see well and cover testing is not possible.     ... Read More »

Tropias and Phorias Differentiating Videos

Tropias and Phorias Differentiating Videos

Tropias and Phorias Differentiating Videos This presentation demonstrates an approach to eye-movement disorders commonly seen in an ophthalmology or optometry clinic. This is the first half of the lecture, and focusses on large-angle tropias and how to document and name tropias (exotropia,esotropia,hypertropia,hypotro­pia).     The second half of this lecture focusses on the difference between phorias and tropias. Specifically, the ... Read More »

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