Author(s): Steven S, Sulai YN, Cheong SK, Bentley J, Dubra A. Long eye relief fundus camera and fixation target with partial correction of ocular longitudinal chromatic aberration. Biomed Opt Express. 2018 Nov 7;9(12):6017-6037. doi: 10.1364/BOE.9.006017. eCollection 2018 Dec 1.
Journal: Biomedical Optics Express, Volume 9, Issue 12, Dec 2018
A combined 32° full field of view refractive fundus camera and fixation target with a -20 to +10 diopter sphere correction range is described and demonstrated. The optical setup partially corrects the average longitudinal chromatic aberration and spherical aberration of the human eye, while providing a long eye relief to allow integration with reflective adaptive optics ophthalmoscopes, as a viewfinder. The fundus camera operates with 940 nm light, using a maximum 2.9 mm diameter imaging pupil at the eye. The fixation target uses a light projector capable of delivering red, green and/or blue spatially and temporally modulated stimuli to the retina. The design and performance of each sub-system are discussed, and retinal imaging at various wavelengths is demonstrated.