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T. Noda, K. Ohno, Y. Fukuma, N. Kitajima, Y. Okazaki, H. Aeba, K. Nishio, K. Negishi, K. Ohnuma; Efficacy of a Variable Aberration Correction Surgical Microscope System in Improving the Quality of Peripheral Fundus Images Seen during Vitreous Surgery through Prism–Type Contact Lenses . Invest. Ophthalmol. Vis. Sci. 2004;45(13):2020.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the quality of peripheral fundus images observed through prism–type vitrectomy contact lenses using a surgical microscope equipped with a variable cross–cylinder and variable direct vision prism system (VCC/VDVP system). Methods: Resolution test charts placed on the peripheral fundus of the artificial model eye were observed experimentally through prism–type contact lenses (30°– and 45°–prism vitrectomy lenses) with a surgical microscope (OMS–610, Topcon) equipped with a computer–regulated VCC/VDVP system. According to the analysis data obtained by simulated geometric point spread functions, the aberrations were corrected with cylindrical lenses for astigmatism and variable prisms for chromatic aberrations in the surgical microscopy system. Results: Astigmatism and chromatic aberrations that substantially degraded the quality of the peripheral fundus images were corrected by the VCC/VDVP system and the resolution of the peripheral fundus observation during vitrectomy was markedly improved. Conclusions: Astigmatism and chromatic aberrations degrade the quality of peripheral fundus images observed through prism–type vitrectomy contact lenses. The quality of the fundus images during vitreous surgery is improved substantially by correcting these aberrations.
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