6 Replies to “Lens Tilt And Perceived Power: Why It’s Important And How It’s Calculated”

  1. Thank you for a really cool and in depth video. Along those lines I have a question that bothers me. Do you then take the OC height not only at a location where the patient is sitting eye to eye but also adjusting for the tilt in such a way that the line of sight comes in at a 90 degree angle either by dropping the height a millimeter for every 2 degrees of tilt or by having the patient tilt their head so that the face of their frame is perpendicular to the ground? Its seems to be real difficult to get a straight answer on this one…Thanks again!

  2. Always enjoy watching your videos first and foremost, thank you! A thought came to mind when watching this, well a question. 🙂 I am under the understanding that when minus lenses move closer to the eye they gain in minus power thus, when plus lenses move closer to the eye they loose plus power.  So when adding panto I thought the lens power would become less plus not more plus.  If you can help clear up my confusion that'd be great.

  3. I work as an Optician in Dr Lunde's office and watch your videos, as a refresher coarse. I have noticed you do not have on on Abbe values. Can you post on it would be a great help for those just starting out. thanks.

  4. Thank you for the whole information you presented its for us.
    My question is : which of the lenses is the alternative for the prescription: OD:-1,25 sph
    OS::1.00sph .i suppose i don’t have -1.00 on my stock and It’s an emergency glasses .which of the alternative on those tree lenses are the best choice as an emergency glasses ? Using -.075 -.025 x90 which the true power is -.100 or
    -1.00 -0.25 x180 which the true power is -1.00 or using -0.75 sph ???

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