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首页> 外文期刊>Journal of the Optical Society of America, A. Optics, image science, and vision >Comparison of double-pass estimates of the retinal-image quality obtained with green and near-infrared light
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Comparison of double-pass estimates of the retinal-image quality obtained with green and near-infrared light

机译：绿光和近红外光获得的视网膜图像质量的两次通过估计的比较

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摘要

We compared retinal point-spread functions obtained by the double-pass method with two different wavelengths, green (543 nm) and near-infrared (780 nm), in both cases under the best conditions of focus. The best refractive state at each wavelength was determined with two procedures: subjective refraction and analysis of the recorded double-pass images as a function of focus. Since the refraction results agree quite well, we assume that in both cases, green and near-infrared light, most of the light of the central core in the double-pass images comes from a layer close to that of the photoreceptors. The central spread of the double-pass images was also quite similar for the two wavelengths: a width of -2-3 arcmin at half-intensity relative to the peak. However, larger differences were found in the tails of the images, with the infrared images presenting a larger scattering halo, probably as a result of a more important contribution of retinal and choroidal scattering for that wavelength. By using the central core in the double-pass images and ignoring the tails, we can use the near-infrared data to predict the modulation transfer function measured with the use of green light. These results raise the possibility of using near-infrared illumination in the double-pass method to estimate the optical performance of the human eye. # 1997 Optical Society of America [S0740-3232(97)00305-0]
机译：我们比较了在最佳聚焦条件下两种情况下通过两次通过方法获得的视网膜点扩展函数的两种不同波长，即绿色（543 nm）和近红外（780 nm）。通过两种程序确定每个波长的最佳折射状态：主观折射和作为焦点函数的记录双程图像分析。由于折射结果吻合得很好，因此我们假设在这两种情况下，在绿色和近红外光的情况下，双程图像中中心核心的大部分光都来自接近感光体的层。对于两个波长，两次通过图像的中心散布也非常相似：相对于峰的半强度处的宽度为-2-3 arcmin。但是，在图像的尾部发现较大的差异，红外图像呈现出较大的散射光晕，这可能是由于该波长的视网膜和脉络膜散射更重要的结果。通过在双通道图像中使用中央核并忽略尾部，我们可以使用近红外数据来预测使用绿光测得的调制传递函数。这些结果提高了在双通道方法中使用近红外照明来估计人眼的光学性能的可能性。 ＃1997美国光学学会[S0740-3232（97）00305-0]

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