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Dr William Boothe - My Blog
Dr William Boothe - My Blog


Dr William Boothe Lasik Eye Surgery
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Dr Boothe

Refractive Error - Too much or too little bending of the light rays entering the eye, so that they focus not on the retina, which would give clear vision, but either in front of it (myopia) or behind it (hyperopia). When the cornea is slightly oval-shaped, rather than perfectly round, it has two curvatures, a steeper one and a flatter one. This also causes refractive error (astigmatism), bending the light rays in two different ways, so that they’re skewed and unable to focus. Refractive error is measured in diopters.



November 21, 2008 | 6:22 AM Comments  0 comments





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