Question 1
Light travels from air into the cornea, whose refractive index is about 1.376. Compared with its speed in air, the speed of light inside the cornea is:
Correct Answer:
Slower
Question 2
The total refractive power of the average human eye is closest to:
Correct Answer:
+60 dioptres
Question 3
The cornea provides about two-thirds of the eye's total refracting power. The single most important reason the cornea refracts so strongly is:
Correct Answer:
The large difference in refractive index between air and the corneal surface
Question 4
A thin lens has a focal length of 0.25 metres. Its dioptric power is:
Correct Answer:
+4 D
Question 5
A prism deviates a ray of light. The direction in which a prism bends the path of light is:
Correct Answer:
Towards its base
Question 1
Exam overview

About this Exam

Prepare with the ICO Visual Sciences Practice Questions - ICO Visual Sciences Examination (Part A) Exam practice quiz. This question bank includes 100 questions covering light, lens, corneal, optic, and nerve. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ICO Visual Sciences Practice Questions - ICO Visual Sciences Examination (Part A) Exam

This practice set contains 100 questions from the matching question bank and focuses on light, lens, corneal, optic, and nerve. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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