definition photosensitive
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photosensitive If left unattended progresses to keratitis. photosensitive dermatitis. is confined to the dorsal parts of the body exposed to the sunlight, and to parts with little or no pigment and the least hair or wool covering. The dermatitis is diffuse and often sufficiently severe to kill the animal.
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- Photography A method of recording the image of an event, person, place, or thing by the action of light on a light-sensitive material. The photographer chooses the subject, vantage point, framing, moment of exposure, and lighting and makes the photograph for documentary or artistic reasons.
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sensitize verb (used with object), sensitized, sensitizing. 1. to render sensitive. 2. Photography. to render (a film or the like) sensitive to light or other forms of radiant energy. 3. Immunology. to render sensitive to an antigenic substance. verb (used without object), sensitized, sensitizing.
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- The Retina. The retina is a light-sensitive layer at the back of the eye that covers about 65 percent of its interior surface. Photosensitive cells called rods and cones in the retina convert incident light energy into signals that are carried to the brain by the optic nerve. thin layer (about 0.5 to 0.1mm thick) of light receptor cells covers the inner surface of the choroid. The focused beam of light is absorbed via electrochemical reaction in this pinkish multilayered structure. The human eye contains two kinds of photoreceptor cells; rods and cones.
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dermatitis photoallergic contact dermatitis, photocontact dermatitis allergic contact dermatitis caused by the action of sunlight on skin sensitized by contact with substances such as halogenated salicylanilides, sandalwood oil, or hexachlorophene.
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- noun, plural sensitivities for 2, 3. 1. the state or quality of being sensitive; sensitiveness. 2. Physiology. the ability of an organism or part of an organism to react to stimuli; irritability.
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Sun sensitivity  ( phototoxicity) and essential oils. Sun sensitivity (phototoxicity) and essential oils. Sun sensitivity (phototoxicity) or otherwise also known as photosensitization occurs when an agent, in our case certain essential oils, are used and they cause the skin to be more sensitive to sunlight (actually any ultra violet - UV - light) and one would therefore burn and damage more easily.
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- Photosensitivity, sometimes referred to as a sun allergy, is an immune system reaction that is triggered by sunlight.Photosensitivity reactions include solar urticaria, chemical photosensitization, and polymorphous light eruption and are usually characterized by an itchy eruption on patches of sun-exposed skin.hemical photosensitivity. Over 100 substances, swallowed or applied to the skin, are known to cause sun-induced reactions on the skin. A limited number cause most reactions (see Some Substances That Sensitize the Skin to Sunlight).
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Photocatalysis In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a catalyst. In catalysed photolysis, light is absorbed by an adsorbed substrate.
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phototoxic Etymology: Gk, phos + toxikon, poison. characterized by a rapidly developing nonimmunological reaction of the skin when it is exposed to a photosensitizing substance and light. Compare photoallergic. See also phototoxic contact dermatitis.
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- The retina is a light-sensitive layer at the back of the eye that covers about 65 percent of its interior surface. Photosensitive cells called rods and cones in the retina convert incident light energy into signals that are carried to the brain by the optic nerve. thin layer (about 0.5 to 0.1mm thick) of light receptor cells covers the inner surface of the choroid. The focused beam of light is absorbed via electrochemical reaction in this pinkish multilayered structure. The human eye contains two kinds of photoreceptor cells; rods and cones.
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Monticello, Minnesota Average climate in Monticello, Minnesota. Based on data reported by over 4,000 weather stations. Tornado activity: Monticello-area historical tornado activity is slightly above Minnesota state average. It is 16% greater than the overall U.S. average.
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- Definition of GENITIVE. 1. : of, relating to, or constituting a grammatical case marking typically a relationship of possessor or source — compare possessive. 2.
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desensitize Definition of desensitize. 1  transitive verb. 2  1 : to make (a sensitized or hypersensitive individual) insensitive or nonreactive to a sensitizing agent. 3  2 : to make emotionally insensitive or callous; specifically : to extinguish an emotional response (as of fear, anxiety, or guilt) to stimuli that formerly induced it.
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Thin layer of tissue covering the front of the eye, except t The Retina. The retina is a light-sensitive layer at the back of the eye that covers about 65 percent of its interior surface. Photosensitive cells called rods and cones in the retina convert incident light energy into signals that are carried to the brain by the optic nerve.ptic Nerve. The optic nerve is the cable of nerve fibers with carries the electrical signals from the retina to the brain for processing. The point of departure of that optic nerve through the retina does not have any rods or cones, and thus produces a blind spot.
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Sensitivity to Light information on nutrition, causes, harmful drugs, lifestyle. Light Sensitivity (photophobia or photosensivity) is a condition where your eyes are overly sensitive to light, possibly causing pain, tearing and discomfort. When light enters the eyes, it causes a chemical reaction in the back of the eyes.
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- photoaging. noun pho·to·ag·ing \-ˈāj-iŋ\. : the cumulative detrimental effects (as wrinkles or dark spots) on skin that result from long-term exposure to sunlight and especially ultraviolet light.— pho·to·aged \-ˈājd\ adjective.hotoaging. noun pho·to·ag·ing \-ˈāj-iŋ\. : the cumulative detrimental effects (as wrinkles or dark spots) on skin that result from long-term exposure to sunlight and especially ultraviolet light.
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Photosensitivity Symptoms of photosensitivity vary from mild to severe. The most common symptom is an exaggerated skin rash or sunburn. Rashes may or may not cause itching. In some cases, a sunburn can be so severe that blistering develops. Weeping of the skin and peeling can also occur in severe cases.
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Mixed Hierarchical Website Structures The mixed hierarchical website structure is a form of the standard hierarchical structure that implements a linear-style design in addition to an implemented hierarchy.While you may not see this style implemented into smaller website projects, it is more common and prevalent in complex large scale websites.ith a mixed website, both the hierarchy and linear concepts are merged together. For instance, the home page (index.html) and the second level pages stay exactly the same. The third level, however, utilizes the linear approach where all of the pages are tied together.
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Overview Photosensitive epilepsy is the most common type of reflex epilepsy. Clinical photoconvulsive seizures or subclinical photoparoxysmal responses occur when an individual is exposed to intermittent light stimulation (ILS), consisting of flashes of light of a particular frequency.
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sensibility Sensitivity is a special capability of being sensitive to physiological, chemical action or a tendency to be easily affected by the adverse reactions of others: the sensitivity of a nerve; sensitivity to criticism. 2. alertness, awareness.
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Se (sĭ-lē'nē-əm) Symbol Se. A nonmetallic element that occurs in a gray crystalline form, as a red powder, or as a black glassy material. It is highly photosensitive and can be used to convert light into electricity. Its ability to conduct electricity also increases with higher exposure to light.
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- Photosensitivity (or sun sensitivity) is inflammation of the skin induced by the combination of sunlight and certain medications or substances.This causes redness (erythema) of the skin and may look similar to sunburn.hotosensitivity (or sun sensitivity) is inflammation of the skin induced by the combination of sunlight and certain medications or substances.
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What is drug induced photosensitivity? Home | Skin reactions to external agents. Drug-induced photosensitivity or photosensitising medications can cause unexpected sunburn or a dry, bumpy or blistering rash on sun-exposed skin (face, neck, arms, backs of hands and often lower legs and feet).
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- Historical Examples. 1  Did quite well with the other drafting equipment, you know, especially the dimensional curve and the photosensitive ink. The Big Bounce Walter S. Tevis. 2  The light causes chemical changes in the eyes (or the photosensitive elements of the skin). The Organism as a Whole Jacques Loeb.
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Phototoxicity Phototoxicity, also called photoirritation, is a chemically induced skin irritation, requiring light, that does not involve the immune system.It is a type of photosensitivity.hototoxicity, also called photoirritation, is a chemically induced skin irritation, requiring light, that does not involve the immune system.