Optics and Refraction — Flashcards

Magnification produced by direct ophthalmoscopy is approximately _____ times

Pinhole prevents the peripheral rays and also reduces the _____ aberration, thus improving visual acuity

Roving-ring scotoma is seen in the correction of aphakia with _____

The refraction of light is the maximum at the _____

Name the type of fused bifocal lens characterized by a round/circular segment.

The distance between the points of convergence (focus) of the vertical and horizontal rays in a Sturm's conoid is called the _____ of Sturm.

In duochrome test, if the patient sees the letters of the _____ side clearer, he is overcorrected

Early Treatment of Diabetic Retinopathy Study (ETDRS) Chart is used for measuring _____

Low myopia is defined as a refractive error of ≤ _____ D.

Shot silk appearance of fundus is seen in _____