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E Kaneda, K Negishi, K Kobayashi, M Shibutani, G Takeuchi, K Ohnuma, N Hirayama, T Noda; Evaluation of Visual Function Using a New Point Spread Function Analysis System in Pseudophakic Eyes with Aftercataract . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2019.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To objectively evaluate the change in visual function in pseudophakic eyes with aftercataract following Nd:YAG laser posterior capsulotomy and to compare that with the results of subjective visual function tests. Methods: The single-pass point spread function (PSF) was obtained from pseudophakic eyes with aftercataract before and after the Nd:YAG laser posterior capsulotomy, using a new PSF analysis system. The retinal images of various sized Landolt's rings were simulated by convolution with single-pass PSF. The contrast of the simulated retinal images was compared with the results of subjective visual function tests, such as visual acuity and contrast sensitivity. Results: The contrast of the simulated retinal images increased after laser treatment, especially at the middle spatial frequency, in patients who complained of visual disturbance preoperatively even where the visual acuity did not decrease. The results corresponded well with that of contrast sensitivity tests in eyes with normal neural function. Conclusion: The new PSF analysis system can objectively detect changes in visual function in pseudophakic eyes with aftercataract following laser treatment. The results of PSF analysis correspond well with the results of subjective visual function tests in eyes with normal neural function.
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