METHODS:Totally 30 myopic patients(58 eyes)wearing nocturnal orthokeratology lens, who received medical treatment at the Department of Ophthalmology of Affiliated People's Hospital of Fujian University of Traditional Chinese Medicine, were included in study(treated group). And 30 myopic patients wearing spectacles at the same time were randomly selected as the control group. Sleep quality of two groups were assessed with Pittsburgh sleep quality index(PSQI)before and after wearing the lens in the first and the third months, and compared.

RESULTS: Equivalent diopter of the 30 patients wearing nocturnal orthokeratology lens was -2.78D±0.90D before treated with orthokeratology lens, -0.30D±0.31D after 1mo of treatment, and -0.28D±0.30D after 3mo of treatment. There was significant difference between the equivalent diopter got before treated with orthokeratology lens and that got after 1mo of treatment(P<0.05), and between the equivalent diopter got before treated with orthokeratology lens and that got after 3mo of treatment(P<0.05). The total scores of PSQI of 30 myopic patients got before wearing nocturnal orthokeratology lens and after 1 or 3mo of that were respectively 2.13±1.36, 2.47±1.98, and 1.74±1.39. There only was significant difference in scores of subjective sleep quality got after 3mo of treatment between treated group and control group(P<0.05), but no significant difference in scores of total PSQI, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction(P>0.05).

CONCLUSION: Wearing nocturnal orthokeratology lens has no significant effect on the overall sleep quality index of myopic patients, but the subjective sleep quality decreased in the early stage of wearing the lens.