Hello everyone, I want to buy something for the development of my child who is 5 years old, what can I recommend? I have already tried many options but they did not work
How does add affect the corridor (for want of perhaps a better term). We're all aware a +2 add vs a +3 add in a PAL is going to have reduced channel width, does the NAL also experience a similar...
So I've always wondered.... What is up with the W. Wollaston base-curve lens series? It gets mentioned in almost any base curve tutorial without any further satisfactory explanation. You mean to...