Difference between revisions of Lens

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==== Distortion Effects ====

Glasses are only perfectly tuned through their optical centers. If your [[Pupillary Distance]], Pupillary height, or lens adjustment are off, you might not be looking through the optical center of the lens, and you are certainly not looking through the optical center when you look around instead of straight ahead. The power of the lens will vary, and unintentional ~~cylinder~~ can be introduced. You may also not be wearing the lens at the intended vertex distance, affecting the effective power of the lens. The stronger the lens the more of a difference this makes.

Glasses are only perfectly tuned through their optical centers. If your [[Pupillary Distance]], Pupillary height, or lens adjustment are off, you might not be looking through the optical center of the lens, and you are certainly not looking through the optical center when you look around instead of straight ahead. The power of the lens will vary, and unintentional prism can be introduced by decentration. You may also not be wearing the lens at the intended vertex distance, affecting the effective power of the lens. The stronger the lens, the more of a difference this makes.

=== Contacts ===

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==See Also==

* [[~~lens~~ selections]]

* [[Diopters#Technical Details]]

* [[Lens selections]]

[[Category:Articles]]

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 ==== Distortion Effects ====
-Glasses are only perfectly tuned through their optical centers.  If your [[Pupillary Distance]], Pupillary height, or lens adjustment are off, you might not be looking through the optical center of the lens, and you are certainly not looking through the optical center when you look around instead of straight ahead.  The power of the lens will vary, and unintentional cylinder can be introduced.  You may also not be wearing the lens at the intended vertex distance, affecting the effective power of the lens.  The stronger the lens the more of a difference this makes.
+Glasses are only perfectly tuned through their optical centers.  If your [[Pupillary Distance]], Pupillary height, or lens adjustment are off, you might not be looking through the optical center of the lens, and you are certainly not looking through the optical center when you look around instead of straight ahead.  The power of the lens will vary, and unintentional prism can be introduced by decentration.  You may also not be wearing the lens at the intended vertex distance, affecting the effective power of the lens.  The stronger the lens, the more of a difference this makes.
 === Contacts ===
@@ Line 25: / Line 25: @@
 ==See Also==
-* [[lens selections]]
+* [[Diopters#Technical Details]]
+* [[Lens selections]]
 [[Category:Articles]]