| photophobic | Relating to or suffering from photophobia. (05 Mar 2000) |
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| photophone | <physics> An apparatus for the production of sound by the action of rays of light. Origin: Photo- + Gr. Sound. Source: Websters Dictionary (01 Mar 1998) |
| photophore | 1. A lamp with reflector used in laryngoscopy and in the examination of other internal parts of the body. 2. In bacteriology, the organ producing intracellular bioluminescence in certain organisms. Origin: photo-+ G. Phoros, bearing (05 Mar 2000) |
| photophoresis | See: extracorporeal photophoresis. Extracorporeal photophoresis, destruction of cells separated from blood in an extracorporeal flow system by ultraviolet activation of chemotherapeutic agents such as psoralens. (05 Mar 2000) |
| photophosphorylation | <plant biology> The synthesis of ATP that takes place during photosynthesis. In noncyclic photophosphorylation the photolysis of water produces electrons that generate a proton motive force which is used to produce ATP, the electrons finally being used to reduce NADP to NADPH. When the cellular ratio of reduced to nonreduced NADP is high, cyclic photophosphorylation occurs and the electrons pass down an electron transport system and generate additional ATP, but no NADPH. (31 Dec 1997) |
| photophthalmia | Keratoconjunctivitis caused by ultraviolet energy, as in snow blindness, exposure to an ultraviolet lamp, arc welding, or the short circuit of a high-tension electric current. See: photoretinopathy. Origin: photo-+ G. Ophthalmos, eye (05 Mar 2000) |
| photopia | Synonym: photopic vision. Origin: photo-+ G. Opsis, vision (05 Mar 2000) |
| photopic | Pertaining to photopic vision. (05 Mar 2000) |
| photopic adaptation | The visual adjustment occurring under increased illumination in which the retinal sensitivity to light is reduced. See: light-adapted eye. Synonym: photopic adaptation. (05 Mar 2000) |
| photopic eye | An eye that has been exposed to light, with bleaching of rhodopsin (visual purple) and insensitivity to low illumination. Synonym: photopic eye. (05 Mar 2000) |
| photopic vision | Vision when the eye is light-adapted. See: light adaptation, light-adapted eye. Synonym: cone vision, photopia. (05 Mar 2000) |
| photopigment | <plant biology> Pigment involved in photosynthesis in plants. Includes chlorophyll, carotenoids and phycobilins. (31 Dec 1997) |
| photoplethysmography | Plethysmographic determination in which the intensity of light reflected from the skin surface and the red cells below is measured to determine the blood volume of the respective area. There are two types, transmission and reflectance. (12 Dec 1998) |
| photopsia | <medicine> An affection of the eye, in which the patient perceives luminous rays, flashes, coruscations, etc. See phosphene. Origin: Gr. Opsis = vision (09 Mar 1998) |
| photopsin | The protein moiety (opsin) of the pigment (iodopsin) in the cones of the retina. (05 Mar 2000) |
| photopsin |
Photopsins are the photoreceptor pigments found in the cone cells of the retina that are the basis of color vision. Photopsins are very close analogs of the visual purple rhodopsin that is used in dark vision. Photopsins consist of a protein called opsin and a bound chromophore, the retinal. Different opsins differ in a few amino acids and absorb light at different wavelengths as retinal-bound pigments. Opsins are G protein-coupled receptors. ...
출처: en.wikipedia.org/wiki/Photopsin
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| photophobia |
Eye discomfort from bright light. Sun glasses or tinted contact lenses are often needed.
출처: www.geocities.com/coloboma_group/words.html
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| photoreceptor |
an element of the retina, which passes an electrical signal on to a neuron of the optic nerve head, depending upon the amount of light it recieves.
출처: www.geocities.com/CapitolHill/1284/glossdef.html
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| photopheresis |
A procedure in which blood is treated outside the body, with ultraviolet light and drugs that become active when exposed to light, and then returned to the body. It is being studied as a treatment for some blood and bone marrow diseases and graft-versus-host disease (GVHD). Also called extracorporeal photophoresis.
출처: www.stjude.org/glossary
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| photophobia |
A condition in which the eyes are more sensitive to light than normal.
출처: www.stjude.org/glossary
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