Optics & Refraction · NEET PG Preparation Ophthalmology
A 35-year-old male presents with decreased vision for distance. Autorefractometry reveals a refraction of -4.00 D sphere in both eyes. The far point…
Practice question from Optics & Refraction (NEET PG Preparation Ophthalmology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-3860E2
A 35-year-old male presents with decreased vision for distance. Autorefractometry reveals a refraction of -4.00 D sphere in both eyes. The far point of this patient's uncorrected eye is located at what distance from the cornea, assuming a standard optical system?
- A.12.5 cm in front of the eye
- B.25 cm in front of the eyeCorrect answer
- C.50 cm in front of the eye
- D.At infinity
Solution
The far point () of a myopic eye is situated at a finite distance in front of the eye, which is the reciprocal of the myopia in diopters. For a -4.00 D refractive error, the far point distance in meters is meters, which equals 25 cm in front of the eye.
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