The surgeon can then lift the flap and perform corneal ablation using an excimer laser, which corrects refractive error in the eye.
32.
Its Eye Health programs address the major causes of blindness in the world, including cataract, trachoma and onchocerciasis, and treating refractive error.
33.
An eye that has refractive error when viewing distant objects is said to have " ametropia " or be " ametropic ".
34.
Among his achievements remembered even today were hard-nosed campaigns for eye donation to treat corneal blindness, and correcting refractive errors among schoolchildren.
35.
The Tonopen can be alternatively used in patients with astigmatism and other irregularities in the cornea such as refractive error and ectasia.
36.
In order to optimize a lens-constant, the user must back calculate the formula so that the actual post-operative refractive error is included.
37.
Monocular diplopia may be due to repetitive images caused by cerebral polyopia or by ghosting image due to refractive errors or retinal diseases.
38.
This definition was set in 1972, and there is ongoing discussion as to whether it should be altered to officially include uncorrected refractive errors.
39.
Changes to refractive error occurring during normal age development need to be accounted for, and children have a higher risk of developing postoperative corneal haze.
40.
Vergence control, and over-convergence associated with the extra accommodation required to overcome a hyperopic refractive error, play a role in the onset of accommodative esotropia.
