The effect of the YK lens in keratoconus.
OBJECTIVE
To report the clinical results of the use of the YK contact lens (Lucid Co., Seoul, Korea) for keratoconus.


METHODS
One hundred and twenty nine keratoconic eyes were fitted with a YK lens which has one base curve and three peripheral curves. A light feather touch fluorescein pattern was obtained based on topographic indices. Visual acuity, comfort, mean wearing time, and ocular tissue changes were evaluated. Mean follow up was 17.5 +/- 13.8 months (range 6-75).


RESULTS
One hundred and twenty six (97.6%) eyes tolerated the contact lenses. A total of 94.5% of the eyes achieved a visual acuity of 20/40 or better (average 0.79 +/- 0.21), and flatter base curve radius (BCR) was related to better visual acuity. One hundred and seventeen (90.7%) eyes reported that the lenses were comfortable. Mean wearing time was 12.1 h per day (range 4-18). Changes in keratometric values were not significant between baseline and final follow-up visit.


CONCLUSIONS
The YK lens can provide successful visual outcome, with comfort, and no significant influence on the progression of keratoconus.
Kang
Young Seok
YS
Noblesse Plastic Surgery Clinic, Pusan, Korea.
Park
Young Kee
YK
Lee
Jong Soo
JS
Lee
Seung Uk
SU
Shin
Jong Hun
JH
Han
Young Sang
YS
Lee
Dong Jun
DJ
Choi
Hee Young
HY
Oum
Boo Sup
BS
Lee
Ji-Eun
JE
D000293:Adolescent; D000328:Adult; D003261:Contact Lenses; D003315:Cornea / Q000503:physiopathology; D019781:Corneal Topography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007640:Keratoconus / Q000503:physiopathology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D017755:Prosthesis Fitting; D013997:Time Factors; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult