Those tiny bubbles are annoying. One thing that has helped me is to have a little dropper of distilled water on-hand. Not sure if it helps more than 10%. I also his the back of the lens and the...
Get a bowl, full of water. Clean the back side of the Rx lens. Mark Fresnel at prism poles with an indelible pens like a lens marker (towards outside of the intended used area). Important : NEVER put...
The BO is there with the minus lens, it's just more difficult to notice. Spot up the OC and draw a vertical diameter line through it to the edges and you'll better see it. It's slight, only about...
I do a fair amount of Fresnel press on prisms for patients newly experiencing diplopia to trial prism correction. I have such a hard time getting them to look completely clear with no bubbles. I...