An Introduction to Vision - MIT Media Lab

An Introduction to Vision - MIT Media Lab

The Eye as a Camera Michael A. Sandberg, Ph.D. Associate Professor of Ophthalmology

Berman-Gund Laboratory for the Study of Retinal Degenerations Harvard Medical School

Massachusetts Eye and Ear Infirmary Principal parts of the camera

The lens and filters Cornea Lens

Macular pigment The aperture

Pupil The shutter

Retina The film

Retina Schematic eye

Optical power of the human eye Cornea: 43 diopters

Lens (eye focused at infinity): 20 diopters Lens (eye focused at near): 28 diopters

Monocular visual field Visual angle of common objects

Sun or moon: 0.5 Thumbnail (at arms length): 1.5 Fist (at arms length): 8 - 10

Optical aberrations

Spherical aberration: < 0.5 diopter Chromatic aberration: 2 diopters

Distribution of macular pigment Range of Vision

Critical duration

Critical flicker frequency Visual acuity versus pupil size

Normal Fundus

The Human Retina Schematic retina

Foveal architecture

In vivo microscopy Photoreceptor structure

Photoreceptor architecture

Directional sensitivity Photoreceptor architecture

Rhodopsin localization

Rhodopsin regeneration Cone pigment regeneration

Dark adaptation

Effect of bleaching on threshold Rod and cone spectra

Luminous efficiency curves

Spectral sensitivity curves Number of photoreceptors in the

human retina Photoreceptor

distribution Photoreceptor mosaic

Foveal cone mosaic

Visual acuity versus eccentricity Visual acuity versus luminance

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