Hello, I'm new to these forums and I have a licensing test soon. In this test I will be required to measure vertical prism in progressives on a virtual lensometer. My question is when looking through the PRP should the mires always be dead centered in the reticle or should they just be in similar spots on the same plane. Thank you
The later. If the prism is yoked (same direction in the same amount ) you do not have any vertical prismatic imbalance ( at the PRP.)
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks