Ophthalmic Near Power Addition Calculator Online

Near Add Calculator

For Optometry Fans & Students

Get a quick Add Power estimate based on average accommodation decline.

Patient Age (40 - 70)

40 45 70

Calculate the Near Add based on working distance (WD) and patient's measured Amplitude of Accommodation (AoA), allowing 50% accommodative reserve.

Target Working Distance (cm)

Measured AoA (Diopters)

Calculated Near Add Power:

+0.00 D

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