התפתחות קרטוקונוס

Introduction:

Keratoconus (KC) is a common chronic, inflammatory ectasia of the cornea (Gordon-Shaag et al., 2015), characterized in corneal steeping resulting in high myopia and irregular astigmatism (Duncan et al., 2016). In early stages of the disease, KC is asymptomatic while as the KC progresses, symptoms include increase in myopia, irregular astigmatism, reduce visual acuity (Duncan et al., 2016). This study tests the natural progression of KC in a cohort of KC and KC suspect patients whose disease was first diagnosed as an incidental finding when they presented as refractive surgery candidates.

Method:

Subjects who incidentally diagnosed with KC upon presentation for refractive surgery for a refractive exam at Care laser (in the past 10 years). Parameters of the follow-up included BCVA, UCVA (Snellen Chart), refractive status (subjective), and corneal tomography, K1 and K2 (Sirius).

Results:

Six subjects were recruited (5 males,8 eyes with KC, 2 KC suspect, age range 19-46, mean age 32.3±11.27 years). Subjects were invited for follow up test after average 4.12±1.67 years (range 3-5 years). We did not find significant change in K reading (steep K P=0.12, Flat K P=0.22), pachymetry (P=0.38), BCVA (P=0.35) and cylinder power (P=0.34). However, significant changes in sphere power toward myopia have been noticed (P<0.01).

Conclusion:

Results include several patients therefore are still ambiguous. More subjects should be tested is required.

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