Thread: Ageing vision, glasses lenses and options.

Folks as I age my vision is becoming less acute. My optician says this is just a natural process but it still agravates me that I cannot spot animals in the bush or in dull light as well ad I used to.
OK, so I have mild short sightedness and revist optician after three years yesterday for a retest. My eye prescription(-.75) has remained constant. However, my specs are in a bad way and lenses need replacing. Glass has best clarity but they almost demand I use polycarbonate lenses. However, my own research indicates polycarb are very costly and least good for acuity compared to glass or CR39 plastic , latter being much less expensive but less profitable for opticians. Polycarb is also much softer and while recommended for safety glasses it is not the clearest.seems to me CR 39 is shatterproof, almost as clear as glass but much cheaper for the customer.
Any comments from experts please? Urgent. Thanks.