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Comprehensive optical design model of the goldfish eye and quantitative simulation of the consequences on the accommodation mechanism
- Source :
- Vision Research. 154:115-121
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- To further extent our understanding of aquatic vision, we introduce a complete optical model of a goldfish eye, which comprises all important optical parameters for the first time. Especially a spherical gradient index structure for the crystalline lens was included, thus allowing a detailed analysis of image quality, regarding spot size, and wavelength dependent aberration. The simulation results show, that our realistic eye model generates a sufficient image quality, with a spot radius of 4.9 mm which is below the inter cone distance of 5.5 mm. Furthermore, we optically simulate potential mechanical processes of accommodation and compare the results with contradictory findings of previous experimental studies. The quantitative simulation of the accommodation capacity shows that the depth of field is strongly dependent on the resting position and becomes significantly smaller when shorter resting positions are assumed. That means, to enable an extended depth perception with high acuity for the goldfish an adaptive, lens shifting mechanism would be required. In addition, our model allows a clear prediction of the expected axial lens-shift, which is necessary to ensure a sufficient resolution over a large object range.
- Subjects :
- genetic structures
Computer science
Image quality
Models, Biological
050105 experimental psychology
law.invention
03 medical and health sciences
0302 clinical medicine
Optics
Position (vector)
law
Goldfish
Lens, Crystalline
Animals
0501 psychology and cognitive sciences
Depth of field
Ocular Physiological Phenomena
Vision, Ocular
Depth Perception
business.industry
05 social sciences
Accommodation, Ocular
Radius
Sensory Systems
Lens (optics)
Ophthalmology
Wavelength
sense organs
business
Depth perception
Accommodation
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 00426989
- Volume :
- 154
- Database :
- OpenAIRE
- Journal :
- Vision Research
- Accession number :
- edsair.doi.dedup.....a836e38463df86fb8bf4ddf10c942215