Wednesday, 11 March 2015

Prescribing lens


🔍 For atropine use correction factor; deduct (-1).
🔍 For all others; deduct (-0.5).

🔍 At 1meter distance, deduct (-1).
🔍 At <1meter distance or closer, deduct (-1.5).
🔍 At arms distance (or) 2/3rd meter distance, deduct (-1.5).

🔍 While prescribing glasses, follow this rule ➡ Smallest whole number will be given as sphere.

🔍 When the power is not same in both axes after correction while prescribing glasses, it is known as HYPEROPIC ASTIGMATISM.

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