Kang Pauline, Swarbrick Helen
School of Optometry and Vision Science, University of New South Wales, Sydney, NSW, 2052, Australia.
School of Optometry and Vision Science, University of New South Wales, Sydney, NSW, 2052, Australia.
Cont Lens Anterior Eye. 2017 Dec;40(6):436-439. doi: 10.1016/j.clae.2017.07.001. Epub 2017 Jul 13.
To report a case of lens discontinuation in a long term orthokeratology (OK) lens wearer and describe regression in refraction, corneal topography, and corneal thickness over 408days after lens discontinuation. Furthermore, the outcome of subsequent LASIK treatment is also reported.
A 41year old Caucasian female who had been previously wearing OK lenses for 13 years discontinued lens wear in the left eye to consider refractive surgery in that eye. The greatest changes in subjective and objective refractions, corneal topography and thickness occurred during the first 28days after lens discontinuation. Subjective refraction did not reach baseline values, but corneal topography parameters returned to pre-OK values after 408days of no lens wear. The patient then received successful refractive surgery treatment in that eye, achieving uncorrected visual acuity of 0.00 LogMAR units, and residual refractive error within ±0.50D of emmetropia.
The period of lens discontinuation required for long term OK lens wearers before refractive surgery is likely to vary between individuals and the patient described in this case report required a significant period of lens discontinuation of at least one year before being considered suitable for refractive surgery.
报告一例长期佩戴角膜塑形术（OK）镜片者镜片停戴的病例，并描述镜片停戴后408天内屈光、角膜地形图和角膜厚度的回退情况。此外，还报告了后续准分子激光原位角膜磨镶术（LASIK）治疗的结果。
一名41岁的白种女性，此前佩戴OK镜片13年，停止左眼佩戴镜片以考虑该眼的屈光手术。主观和客观屈光、角膜地形图和厚度的最大变化发生在镜片停戴后的前28天。主观屈光未达到基线值，但在无镜片佩戴408天后角膜地形图参数恢复到佩戴OK镜片前的值。然后该患者在该眼接受了成功的屈光手术治疗，裸眼视力达到0.00 LogMAR单位，残余屈光不正度数在正视眼±0.50D范围内。
长期佩戴OK镜片者在进行屈光手术前所需的镜片停戴时间可能因人而异，本病例报告中的患者在被认为适合屈光手术之前需要至少一年时间的显著镜片停戴期。
