| D011305 |
Presbyopia |
The normal decreasing elasticity of the crystalline lens that leads to loss of accommodation. |
Presbyopias |
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| D012029 |
Refraction, Ocular |
Refraction of LIGHT effected by the media of the EYE. |
Ocular Refraction,Ocular Refractions,Refractions, Ocular |
|
| D003261 |
Contact Lenses |
Lenses designed to be worn on the front surface of the eyeball. (UMDNS, 1999) |
Lenses, Contact,Contact Lens,Lens, Contact |
|
| D003315 |
Cornea |
The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed) |
Corneas |
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| D006801 |
Humans |
Members of the species Homo sapiens. |
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man |
|
| D000180 |
Acrylic Resins |
Polymers of high molecular weight which are derived from acrylic acid, methacrylic acid or other related compounds and are capable of being molded and then hardened to form useful components. |
Acrylic Resin,Resin, Acrylic,Resins, Acrylic |
|
| D014792 |
Visual Acuity |
Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast. |
Acuities, Visual,Acuity, Visual,Visual Acuities |
|
| D055095 |
Optics and Photonics |
A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range. |
Photonics,Photonics and Optics |
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