Macular Degeneration Treatment

Appraising your PD: This measurement is the distance between the centre of your pupils that is measured in millimetres. Opticians do not tend to give out this measurement as it encourages patients to buy their spectacles from them whereas you can buy cheap spectacles online or designer glasses at a fraction of the price online. [...]

Unbelievably, in the old days, a person’s reading eyeglasses’ strength was only a function of that person’s age. Hence a man of about 30 would be given lenses with 2 degrees of strength and a person of about 70, given, roughly, 4 degrees. It wasn’t until the middle of the 19th century that eyeglasses started [...]