Question from Optician

by Tamir
(Egypt)

I am an optician who is exerting great efforts to enable his customers comfortable and an acute vision.

I hope you excuse me for sharing you this dilemma.

I know that the fovea in the center of the macula, is the portion that in charge of the acute vision, while the other parts of retina are charged for the peripheral vision.

When we turn our eyes, we do so to enable the beam of light incident on the retinal to fall in the fovea.
because the eye in its orbit is a bit looks down (not straight ahead) it is good for the optician to make a pantoscopic tilt in the frame.

What I am asking for here. Is there any relation between tilting the frame, and therefore, lowering the optical center of the lens, and enabling the beams of light to go through the visual axis of the eye and then fall on the fovea?

Thanks in advance.

REPLY

Hi Tamir,

My understanding of pantoscopic tilt is that the visual axis no longer goes through the optical center of the lens and thereby, the power of the viewing system/lens is changed.

In other words, by tilting the lens, the light rays that hit the fovea (fovea and macula are the same) simply are altered by viewing through another portion of the lens.

Randall V. Wong, M.D.

Dr. Wong is a Retina Specialist in Fairfax Virginia

Retina Specialist
Fairfax Virginia