Ophthalmology
PD ruler
4,500.00 NGN
In StockA PD (Pupillary Distance) ruler measures the distance in millimeters between the centers of your pupils, essential for accurately positioning prescription lenses in eyeglasses. Average adult PD is roughly 54-74mm. Measurements can be taken at home using a printable PDF ruler, a digital camera tool, or by having a friend measure while looking 8 inches from a mirror.
