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Optics Letters Jul 2023We demonstrate the feasibility of a multimodal adaptive optics flood-illumination ophthalmoscope, able to provide both bright-field and dark-field images (such as phase...
We demonstrate the feasibility of a multimodal adaptive optics flood-illumination ophthalmoscope, able to provide both bright-field and dark-field images (such as phase contrast). The multimodality was made possible by integrating a digital micromirror device (DMD) at the illumination path to project a sequence of complementary high-resolution patterns into the retina. Through a versatile post-processing method that digitally selects backscattered or multiply scattered photons, we were able: (1) to achieve up to four-fold contrast increase of bright-field images when imaging the photoreceptor mosaic and nerve fibers; and (2) to visualize translucent retinal features such as capillaries, red blood cells, vessel walls, ganglion cells, and photoreceptor inner segments through phase contrast.
Topics: Retinal Cone Photoreceptor Cells; Lighting; Floods; Tomography, Optical Coherence; Retina; Ophthalmoscopes
PubMed: 37450750
DOI: 10.1364/OL.495515 -
The British Journal of Ophthalmology Feb 1994
Topics: Humans; Lasers; Ophthalmoscopes; Ophthalmoscopy; Retina
PubMed: 8123629
DOI: 10.1136/bjo.78.2.81 -
Acta Ophthalmologica Mar 2019
Comparative Study Randomized Controlled Trial
Topics: Education, Medical, Undergraduate; Humans; Ophthalmology; Ophthalmoscopes; Ophthalmoscopy; Smartphone
PubMed: 30302917
DOI: 10.1111/aos.13934 -
The Practitioner Feb 1992
Review
Topics: Eye Diseases; Fundus Oculi; Humans; Ophthalmoscopes; Ophthalmoscopy
PubMed: 1598330
DOI: No ID Found -
Vestnik Oftalmologii 2007
Review
Topics: Diagnosis, Differential; Equipment Design; Humans; Ophthalmoscopes; Ophthalmoscopy; Retinal Diseases
PubMed: 17672098
DOI: No ID Found -
The British Journal of Ophthalmology Apr 1998
Topics: Fundus Oculi; Humans; Microscopy, Confocal; Ophthalmoscopes; Ophthalmoscopy
PubMed: 9640175
DOI: 10.1136/bjo.82.4.337 -
Ophthalmology Feb 1984An indirect ophthalmoscope that could provide higher magnification (up to 15X) would offer definite advantages in fundus diagnosis. If it could also supply an erect... (Comparative Study)
Comparative Study
An indirect ophthalmoscope that could provide higher magnification (up to 15X) would offer definite advantages in fundus diagnosis. If it could also supply an erect fundus image, it could advantageously replace the surgical microscope in vitrectomy operations. The surgical microscope requires the use of a contact lens, which restricts the surgical techniques and may damage the corneal epithelium, and it reduces image brightness when the magnification is increased. In contrast, an indirect ophthalmoscope does not require a contact lens and keeps the image brightness constant regardless of magnification. Increased magnification can be obtained in an indirect ophthalmoscope by incorporating telescopes in the ophthalmoscope oculars. The possible use of two telescopic systems, Keplerian and Galilean, and the problems of stereopsis and image inversion are discussed. A new, optimized ophthalmoscope is described, with Keplerian telescopes, that provides a range of magnifications from 2X to 15X as well as options for an erect or inverted fundus image.
Topics: Humans; Ophthalmoscopes
PubMed: 6709334
DOI: 10.1016/s0161-6420(84)34310-x -
The Veterinary Clinics of North... Sep 2015Ophthalmic diseases are common in rabbits and rodents. Fast and definitive diagnosis is imperative for successful treatment of ocular diseases. Ophthalmic examination in... (Review)
Review
Ophthalmic diseases are common in rabbits and rodents. Fast and definitive diagnosis is imperative for successful treatment of ocular diseases. Ophthalmic examination in rabbits and rodents can be challenging. Oculoscopy offers great magnification for the examination of the ocular structures in such animals, including the evaluation of cornea, anterior eye chamber, limbus, iris, lens, and retina. To date, oculoscopy has been described only sporadically and/or under experimental conditions. This article describes the oculoscopy technique, normal and abnormal ocular findings, and the most common eye disorders diagnosed with the aid of endoscopy in rabbits and rodents.
Topics: Animals; Eye; Eye Diseases; Ophthalmoscopes; Rabbits; Rodent Diseases; Rodentia
PubMed: 26117523
DOI: 10.1016/j.cvex.2015.04.002 -
Archives of Ophthalmology (Chicago,... Oct 1970
Topics: Germany; History, 19th Century; Ophthalmoscopes; Ophthalmoscopy
PubMed: 4923814
DOI: 10.1001/archopht.1970.00990040522024 -
Nippon Ganka Gakkai Zasshi Jan 2016
Topics: Humans; Microscopy, Confocal; Ophthalmoscopes; Optical Imaging
PubMed: 26950963
DOI: No ID Found