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2. George M. Stratton - Wikipedia

   en.wikipedia.org/wiki/George_M._Stratton

   George M. Stratton. George Malcolm Stratton (September 26, 1865 – October 8, 1957) was an American psychologist who pioneered the study of perception in vision by wearing special glasses which inverted images up and down and left and right. He studied under one of the founders of modern psychology, Wilhelm Wundt, and started one of the first ...

3. Ophthalmic trial frame - Wikipedia

   en.wikipedia.org/wiki/Ophthalmic_trial_frame

   ophthalmic trial frame is used to hold lenses and other accessories during correction of refractive errors. Test of. Visual acuity. A trial frame is a tool used by ophthalmic professionals like ophthalmologists and optometrists. It is basically an adjustable spectacle frame with multiple cells, used to hold corrective lenses, and other ...

4. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Corrective lens. A pair of contact lenses, positioned with the concave side facing upward. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia.

5. Fixation disparity - Wikipedia

   en.wikipedia.org/wiki/Fixation_disparity

   Eye glasses with an included prism power is the optical method to reduce a fixation disparity. Different procedures have been proposed to determine the required amount of prism for the individual. Based on prism-FD curves (Fig. 3b), one can find the aligning prism sP 0 that nullifies the naturally prevailing fixation disparity sFD 0. This test ...

6. Hypertropia - Wikipedia

   en.wikipedia.org/wiki/Hypertropia

   Hypertropia is a condition of misalignment of the eyes ( strabismus ), whereby the visual axis of one eye is higher than the fellow fixating eye. Hypotropia is the similar condition, focus being on the eye with the visual axis lower than the fellow fixating eye. Dissociated vertical deviation is a special type of hypertropia leading to slow ...

7. Dissociated vertical deviation - Wikipedia

   en.wikipedia.org/wiki/Dissociated_vertical_deviation

   Dissociated vertical deviation. Dissociated vertical deviation ( DVD) is an eye condition which occurs in association with a squint, typically infantile esotropia. The exact cause is unknown, although it is logical to assume it is from faulty innervation of eye muscles.