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2. Astigmatism - Wikipedia

   en.wikipedia.org/wiki/Astigmatism

   Against-the-rule astigmatism – the horizontal meridian is steepest (a rugby ball or American football standing on its end). [17] Oblique astigmatism – the steepest curve lies in between 120 and 150 degrees and 30 and 60 degrees. [17] Irregular astigmatism – principal meridians are not perpendicular.

3. Humphrey visual field analyser - Wikipedia

   en.wikipedia.org/wiki/Humphrey_Visual_Field_Analyser

   The grey scale is a graphical representation of the numerical display, allowing for easy interpretation of the field loss. Lower sensitivities are indicated by darker areas and higher sensitivities are represented with a lighter tone. [3] This scale is used to demonstrate vision changes to the patient but is not used for diagnostic purposes.

4. Refractive error - Wikipedia

   en.wikipedia.org/wiki/Refractive_error

   Astigmatism is when the refractive power of the eye is not uniform across the surface of the cornea because of asymmetry. In other words, the eye focuses light more strongly in one direction than another, leading to distortion of the image.

5. Astigmatism (optical systems) - Wikipedia

   en.wikipedia.org/wiki/Astigmatism_(optical_systems)

   Astigmatism can be often corrected by glasses with a lens that has different radii of curvature in different planes (a cylindrical lens), contact lenses, or refractive surgery. [5] Astigmatism is quite common. Studies have shown that about one in three people suffers from it. [6] [7] [8] The prevalence of astigmatism increases with age. [9]

6. Alpins method - Wikipedia

   en.wikipedia.org/wiki/Alpins_method

   The intended putt (the path from the ball to the hole) corresponds to Alpins' target-induced astigmatism vector (TIA), which is the astigmatic change (by magnitude and axis) the surgeon intends to induce to correct the patient's pre-existing astigmatism to the derived or calculated target.

7. Javal's rule - Wikipedia

   en.wikipedia.org/wiki/Javal's_rule

   Javal's rule is a mathematical formula used to estimate astigmatism based on keratometry readings. [1] The estimate is useful for high cylinder measures, generally over -2.00 diopters. The estimate is found by multiplying the difference in power between the two meridians by 1.25 and factoring in the average lenticular astigmatism, which is -0. ...

8. Narcissists maintain control through ‘bright siding.’ Here’s ...

   www.aol.com/narcissists-maintain-control-bright...

   "Try to see the good in people." "Come on − he can't be that bad." "You should be grateful to even be in a relationship." If you've heard these phrases before, chances are you've been bright sided.

9. Visual acuity - Wikipedia

   en.wikipedia.org/wiki/Visual_acuity

   A person meets the criteria for permanent blindness under section 95 of the Social Security Act if the corrected visual acuity is less than 6/60 on the Snellen Scale in both eyes or there is a combination of visual defects resulting in the same degree of permanent visual loss. [34]