Therefore, in July 1985, he applied for a patent that described a method of modifying corneal refractive errors using laser ablation under a corneal flap.
42.
This means that one must calculate the constant so that a recalculation of the formula would predict exactly the same refractive error as actually observed.
43.
Opticians convert a prescription for the correction of a refractive error into an ophthalmic lens or some other device, such as reading aids or telescopic lenses.
44.
In recognition of the fact that comparison of ideal IOL powers is likely to be error-prone, all comparisons are done for actual or predicted refractive errors.
45.
The need for accessible, low cost eye diagnostics like NETRA is tremendous and is global in scale over half a billion people have uncorrected refractive errors.
46.
They can have 4, 8, 12, 16 or 32 incisions made in a number of patterns and orientations based on refractive errors, surgeon style and surgeon training.
47.
Other causes of a visual difference between right and left eyes, such as asymmetrical cataracts, refractive error, or other eye disease, can also cause or worsen strabismus.
48.
"This is a high quality public health program which seeks to solve one public health problem : refractive error, " said Claire Peterson, Childsight's director of programs.
49.
"Many products could use low-cost electroactive lenses, " said Thibos, " for instance, the instruments clinicians use to measure refractive error or to look for glaucoma ."
50.
In a few cases of strabismic children with anisometropic amblyopia, a balancing of the refractive error eyes via refractive surgery has been performed before strabismus surgery was undertaken.
