Optics and Refraction — Flashcards

Flashcard 11: What type of lens is the following? _____

Answer: Trifocal

Flashcard 12: What type of lens is the following? _____

Answer: Kryptok bifocal

Flashcard 13: _____ (flip-cross technique) is used to refine the power and axis of the cylindrical lens.

Answer: Jackson’s cross cylinder

Flashcard 14: Major cause of visual impairment in the 0-49 years age group is _____

Answer: refractive errors

Extra: According to recent surveys (like NPCB in India), uncorrected refractive errors are the leading cause of visual impairment in the general population, particularly in those under 50 years of age.

Flashcard 15: 28d5190692654e40ad9eaeb07f342e61-ao-1

Answer: light reflection factor

Extra: 

Flashcard 16: 28d5190692654e40ad9eaeb07f342e61-ao-2

Answer: light reflection factor

Extra: 

Flashcard 17: f197c79a80244bd7a7c4b112aff4634f-oa-4

Answer: Lorentz formula

Extra: indicators of obesity

Flashcard 18: _____ test is based on chromatic aberration and is used to refine the final sphere in subjective refraction

Answer: Duochrome

Flashcard 19: The smallest letter on Jaeger's chart is designated as _____ or J1 and the largest is N48.

Answer: N5

Flashcard 20: Pathological myopia presents with _____ eyeballs, large cornea and deep AC

Answer: prominent