A patient has simple uncorrected myopia of 2.00 D. Where does his far point lie?

• A At infinity
• B 2 m in front of the eye
• C 50 cm behind the eye
• D 50 cm in front of the eye ✓

Explanation

In myopia the far point is the conjugate focus of the retina and lies real, in front of the eye. Its distance in metres is the reciprocal of the refractive error in dioptres: 1 divided by 2.00 A equals 0.5 m, that is 50 cm. D far point behind the eye occurs in hypermetropia, where it is virtual. Infinity is the far point of the emmetropic eye.

Reference: Khurana Comprehensive Ophthalmology, 7th ed.

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Written and medically reviewed by the StethoPrep medical team.