Optics & Refraction · NEET PG Preparation Ophthalmology
Which of the following optical conditions is characterized by the principal meridians of the eye having different focal powers, with both meridians f…
Practice question from Optics & Refraction (NEET PG Preparation Ophthalmology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-B9B053
Which of the following optical conditions is characterized by the principal meridians of the eye having different focal powers, with both meridians focusing either in front of or behind the retina, but never directly on it?
- A.Simple myopic astigmatism
- B.Compound myopic astigmatismCorrect answer
- C.Simple hypermetropic astigmatism
- D.Mixed astigmatism
Solution
In compound myopic astigmatism, both principal meridians of the eye focus in front of the retina (one more anterior than the other), meaning both focal lines are formed prematurely. Compound hypermetropic astigmatism has both behind the retina, mixed has one in front and one behind, and simple has one on the retina.
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