Optics and Refraction — Flashcards

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

Refractive power (dioptre) =  1/_____

The refractive index of the lens in the nucleus is _____

The angle subtended by the largest letter on the Snellen chart at 60m distance is _____.

Magnification produced by indirect ophthalmoscopy is approximately _____ times

_____ can be used to find out the optimal site for optical iridectomy in case of corneal opacities

Which color vision test involves matching a central colored spot to one of four peripheral colored spots?

The total refractive power of lens in reduced eye: _____ D

A patient with 1 D myopia would exhibit _____ movement of red reflex when retinoscopy is done from a distance of 1m without cycloplegia.

Moderate hypermetropia: error of _____D