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Y. Haruhata, T. Noda, K. Akiyama, Y. Fukuma, N. Kitajima, Y. Okazaki, H. Aeba, K. Nishio, K. Negishi, K. Onuma; Evaluation of the Quality of Macular Fundus Images Seen during Vitreous Surgery through Plano–Concave Contact Lenses Using a Surgical Microscope . Invest. Ophthalmol. Vis. Sci. 2004;45(13):2015.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the quality of macular fundus images observed through plano–concave vitrectomy contact lenses using a surgical microscope. Methods: Simulated geometric point spread functions (geometric PSFs) of macular fundus images in several wavelengths that were to be observed through a variety of plano–concave contact lenses with a surgical microscope (OMS–610, Topcon) were calculated from optical data using the ray–tracing method. Chromatic aberrations were estimated and compared with those in which the optical design of the objective lens in the microscope was altered in reducing the total chromatic aberrations. Results: Chromatic aberrations were induced to degrade the quality of the macular fundus images depending on the optical properties of the contact lenses and the magnification. Estimated geometric PSFs were significantly improved by altering the objective lens data in reducing the total chromatic aberration. Conclusions: Chromatic aberrations degrade the quality of macular fundus images observed during vitreous surgery, and they might be improved substantially by altering the optical conditions of the microscope system for fundus observation.
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