Differences between wavefront and subjective refraction for infrared light.
Differences between wavefront and subjective refraction for infrared light.
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红外光的波前和主观折射之间的差异。
DOI：
10.1097/opx.0000000000000370
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Thibos,LarryN
中科院分区：
文献类型：
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作者：
Teel,DanielleFW;Jacobs,RobertJ;Copland,James;Neal,DanielR;Thibos,LarryN
PurposeTo确定的准确性，客观波前折射预测主观refractions单色infraredlight.Methodsobjective屈光获得了一个商业波前像差仪（COAS，波前科学）。用散斑视力计获得30名受试者的主观屈光度，该散斑视力计针对物理模型眼睛上的客观Zernike波前屈光度进行验证（Teel等人，用于激光散斑的红外Badal视力计的设计和验证，Optom维斯科学2008; 85：834-42）。两种仪器都使用近红外（NIR）辐射（COAS为835 nm，散斑视力计为820 nm），以避免校正眼睛色差。一个3毫米的人工瞳孔被用来减少并发症归因于高阶眼像差。与近轴（赛德尔）和最小均方根（泽尼克）波前折射率的比较，客观折射率也确定了一个电池的29个图像质量指标，通过计算校正透镜，优化视网膜图像quality.ResultsObjective泽尼克折射率是近视比主观折射率为29的30名受试者。总体平均差异为-0.26屈光度（D）（SEM= 0.03 D）。近轴（Seidel）客观屈光度倾向于远视偏倚（平均差异=+0.20 D，SEM= 0.06 D）。基于视网膜图像质量的屈光度在29个指标中有28个存在近视偏倚。所有31项测量的平均偏倚为-0.24 D（SEM= 0.03）。近视偏见的客观折射率是更大的眼睛与棕色的虹膜与蓝色irises.ConclusionsOur的实验结果是一致的假设，即反射近红外光捕获的像差仪起源于散射源位于后面的圆锥形光感受器的入口孔径，视网膜色素上皮细胞附近。棕色眼睛的较大近视偏差表明，与蓝色眼睛相比，棕色眼睛中的脉络膜黑色素反射了更大比例的NIR光。
PurposeTo determine the accuracy of objective wavefront refractions for predicting subjective refractions for monochromatic infrared light.MethodsObjective refractions were obtained with a commercial wavefront aberrometer (COAS, Wavefront Sciences). Subjective refractions were obtained for 30 subjects with a speckle optometer validated against objective Zernike wavefront refractions on a physical model eye (Teel et al., Design and validation of an infrared Badal optometer for laser speckle, Optom Vis Sci 2008; 85: 834–42). Both instruments used near-infrared (NIR) radiation (835 nm for COAS, 820 nm for the speckle optometer) to avoid correction for ocular chromatic aberration. A 3-mm artificial pupil was used to reduce complications attributed to higher-order ocular aberrations. For comparison with paraxial (Seidel) and minimum root-mean-square (Zernike) wavefront refractions, objective refractions were also determined for a battery of 29 image quality metrics by computing the correcting lens that optimizes retinal image quality.ResultsObjective Zernike refractions were more myopic than subjective refractions for 29 of 30 subjects. The population mean discrepancy was− 0.26 diopters (D)(SEM= 0.03 D). Paraxial (Seidel) objective refractions tended to be hyperopically biased (mean discrepancy=+ 0.20 D, SEM= 0.06 D). Refractions based on retinal image quality were myopically biased for 28 of 29 metrics. The mean bias across all 31 measures was− 0.24 D (SEM= 0.03). Myopic bias of objective refractions was greater for eyes with brown irises compared with eyes with blue irises.ConclusionsOur experimental results are consistent with the hypothesis that reflected NIR light captured by the aberrometer originates from scattering sources located posterior to the entrance apertures of cone photoreceptors, near the retinal pigment epithelium. The larger myopic bias for brown eyes suggests that a greater fraction of NIR light is reflected from choroidal melanin in brown eyes compared with blue eyes.