Visual Acuity Glasses
Hold the iDevice 16 inches away. Near vision is measured.
Wear usual reading glasses
Subject are usually older than 44 years
Glasses with +2.50 Power
1. Substitute for adults needing reading glasses (presbyopia)
2. Screening children for myopia (nearsighted). Adding this lens will blur a nearsighted person and thereby identify who needs distance glasses.
Left Eye Testing
The left eyes sees through a +2.50 diopter lens and the opposite eye is occluded.
Testing Right Eye
Right eye see through a +2.50 diopter lens and the opposite eye is occluded.