生理性调节下正视眼视觉质量变化的观察

Change of the Emmetropic Eye's Vision Quality Induced by Physiologic Accommodation

目的:观察正视眼不同调节状态下视觉质量的变化情况及其与调节状态的关系。方法:观察正视眼志愿者共99例(198眼),严格纳入标准,选取符合要求的检查对象25例(46眼)。用Tracey iTrace视觉功能分析仪(Tracey Technologies)及其操作系统同步检测不同调节状态下正视眼的屈光容量及全眼及眼内的实时波前像差,数据通过Zernike多项式系数和各阶波前像差的均方根表示,用以模拟和评估视觉质量的变化。用Push-up法测量检查对象调节幅度。结果:在不同生理调节状态下的比较发现,调节紧张状态时像差值较大,雾视后及调节放松状态均有较小的像差值,尤其雾视后像差值最小。调节幅度检查结果在正常范围内的正视眼在实际调节中调节反应远较调节幅度小。结论:在实际用眼中,由于调节反应诱发屈光力变化范围以及角膜的像差补偿作用,正视眼总能维持较高的视觉质量。

Objective：To investigate change of the vision quality induced by physiologic accommodation in emmetropia.Methods： The wavefront of 46 emmetropic eyes was measured with a Tracey iTrace Visual Function Analyzer system in 3 different states of accommodation with a pupil diameter of 3 mm,and was recorded in the from of Zernike coefficients and root mean square.Accommodative response was measured at the same time.Amplitude of accommodation was tested by Push-up test.Results： The total wavefront aberration（WA） of the whole eyes and the inter eyes changed with the function of accommodation.The smallest WA showed when the eyes were fogged.Refraction volume of accommodation response was always lower than Amplitude of accommodation tested by Push-up test in each of the individual cases.Conclusions： The WA analysis result expressed the change of emmetropic eye＇s vision quality induced by the function of accommodation.In fact,most of the time the moderate volume of accommodation response and the corneal compensation of inter eye wavefront make a stable and qualified vision quality possible.