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Atsushi Hayashi, Mitsuya Otsuka, Masaaki Ishida, Toshihiko Oiwake; Recovery of cone photoreceptors at the macula after concussion of the retina. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):89.
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© ARVO (1962-2015); The Authors (2016-present)
To examine changes in cone photoreceptors at the macula after concussion of the retina with an adaptive optics (AO) fundus camera.
Two patients after blunt injury who visited Toyama University Hospital were included in this study. Patient#1 was 16 years old female and patient#2 was 27 years old male. They were followed more than 3 months and underwent comprehensive ophthalmic examinations and AO fundus camera (rtx1™, Imagine Eyes, France) examination during the follow-up. Cone densities at 500 µm and 1000µm from the foveal center of the injured eyes were obtained with AOdetect software. OCT images were compared to the AO images.
Cone densities of the patient#1were increased from 3984 /mm2 to 16317 /mm2 at 500µm, and 3803 /mm2 to 9766 /mm2 at 1000µm during 6 months after the injury. Cone densities of the patient #2 were also increased from 4044/mm2 to 9533 /mm2 at 500µm, and 1285 /mm2 to 6686 /mm2 at 1000µm during 3 months after the injury. Visual acuity was improved to 1.0 at 3 months in both patients. OCT images showed irregular inner segment ellipsoid line and cone outer segment tip line at the macula.
This is the first report to show the recovery of cone densities after concussion of the retina. Even though visual acuity and OCT images recovered with time, cone densities at the macula remained reduced.
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