eye spots definition
e978357c6d36a99f06ceeb954309c5fc
- Definition of eyespot. 1  1 : a usually small spot of color (as on the wing of a butterfly) that resembles an eye. 2  2a : a simple visual organ of pigment or pigmented cells covering a sensory termination : ocellusb : a small pigmented body of various unicellular algae.
b38989f810eb99a3630dbcf4261135b2
- : the dense fibrous opaque white outer coat enclosing the eyeball except the part covered by the cornea — see eye illustration.— scler·al \-əl\ adjective. See sclera defined for kids. the dense fibrous opaque white outer coat enclosing the eyeball except the part covered by the cornea—called also sclerotic, sclerotic coat. Britannica.com: Encyclopedia article about sclera.
0dbc7c8d955ff443d4b5e0a3c83e8987
What is the Pupil of the Eye? - Definition & Function The pupil of the eye is the black circle in the center of your iris. The iris is the colored ring in your eye whose color and structure is as individual as you are. From the outside of the eye, light passes through the clear lens, then through the hole that is the pupil.
323d626548d0f38bdda9e100528dbb21
skin diseases and disorders Condition characterized by increased pigmentation on the skin in spots that are not elevated, such as a Liver spots. Comedo (plural: comedones) Non-inflamed hair follicle filled (buildup) with cells, keratin, sebum & other debris inside follicles.
517ab49395a67c280258ed3e2537a301
blind spot Definition of blind spot. 1  1a : the small circular area at the back of the retina where the optic nerve enters the eyeball and which is devoid of rods and cones and is not sensitive to light —called also optic disk — see eye illustrationb : a portion of a field that cannot be seen or inspected with available equipment.
7ffbc7c5f79d3958f4fb0a4394d27534
What Are the Main Causes of Eye Floaters? What are eye floaters? Eye floaters are small, moving spots in a person's field of vision. They appear in different shapes, such as dark spots, cobweb strands or squiggly lines, according to Mayo Clinic. Eye floaters are often more noticeable when looking at a bright object or in direct sunlight.
945285aa62740295d6083fe492f678c2
Patient Info Brown Spots. Brown spots are commonly known as age spots, but are not related to the aging process. These are dark brown patches on the skin that initially appear on the face and gradually involve the other areas of the body.
f8545289e0188c93eca370d6a7d90b57
- 1. 1  Anatomy. a small area on the retina that is insensitive to light due to the interruption, where the optic nerve joins the retina, of the normal pattern of light-sensitive rods and cones. 2  an area or subject about which one is uninformed, prejudiced, or unappreciative: 3  dead spot (def 1).
d2e8949047a5444073774a538fb65634
Eyeball spots Symptom specific forums: The following patient stories in our interactive forums and message boards relate to Eyeball spots or relevant symptoms: 1  Neurological (Nerves) (771)  Strange Deja Vu, followed by nausea, dizziness and confusion.
a4bbc0a29dd53a51d7da47fe8f74114c
Overview Eye floaters are spots in your vision. They may look to you like black or gray specks, strings or cobwebs that drift about when you move your eyes and appear to dart away when you try to look at them directly.
90a4caf7a5149aeeb4f99dc54237e95f
Eyeball spots Eyeball spots: Introduction. Spots that can actually be seen on the eyeball by another person need to be distinguished from visual spots or retinal spots that are seen only by the person (e.g. floaters)....more ». » Review Causes of Eyeball spots: Causes | Symptom Checker » | Assessment Questionnaire ».
b2670372b42c9370a6ea07fd66d5f68c
Eye Floaters, Flashes And Spots Eye floaters are those tiny spots, specks, flecks and cobwebs that drift aimlessly around in your field of vision. While annoying, ordinary eye floaters and spots are very common and usually aren't cause for alarm.
3b5ead1615e8889665e2b21363f02682
Dark Spots on Face: Causes and Treatments A dark spot refers to a hyper-pigmentation of the skin commonly occurring in middle aged women. Dark spots, aka pigmentations, occur when a localized patch of melanin produced accumulates on a specific area on the skin. It can be located on the forehead, face or cheek bone area.
15d5722d9eacfaf50a925515f4012c91
spot 1. a rounded mark or stain made by foreign matter, as dirt. 2. something that mars one's character or reputation; flaw. 3. a small blemish, mole, or other circumscribed mark on the skin. 4. a small part of a surface differing from the rest in color, texture, or character: a bald spot. 5. a place; locality: the spot where the explorers landed.
d4d2549ebe0c0fb494cc4e51fa38c7f3
Eye Floaters, Flashes And Spots Eye floaters are those tiny spots, specks, flecks and cobwebs that drift aimlessly around in your field of vision. While annoying, ordinary eye floaters and spots are very common and usually aren't cause for alarm. Floaters and spots typically appear when tiny pieces of the eye's gel-like vitreous break loose within the inner back portion of the eye. When we are born and throughout our youth, the vitreous has a gel-like consistency.
21c3137472e03c73048be42ad5aa8b3b
What is the Pupil of the Eye? - Definition & Function The pupil of the eye is the black circle in the center of the iris. The iris is the colored ring in the eye with a color and structure unique to each person. From the outside of the eye, light passes through the clear lens, then through the pupil.
3e71f78135c2027ee95df713e171f69b
blind spot blind spot. n. 1. (Physiology) a small oval-shaped area of the retina in which vision is not experienced. It marks the nonphotosensitive site of entrance into the eyeball of the optic nerve. See optic disc.
801907adcf2c1637abcd033b91559aeb
spot n (prolonged focus), the apparent size and shape of the focal spot when viewed from a position in the useful beam. With the use of a suitably inclined anode face, the area from which the useful beam stems is sharply concentrated, if seen from the perspective of the useful beam. See also line, focus.
c6ac92e3e58e0c8068a6044b64e6973a
Ophthalmic Dictionary of Eye Conditions & Terms An eye drop used to constrict pupils, used in the treatment of glaucoma. pinguecula. A degenerative condition in which yellowish-brown nodules appear under the conjunctiva on either side of the cornea. pink eye. Acute contagious conjunctivitis.
ee1f85c2de402b5bcbbb30da4b199cf2
macula Noun. ( 1 anatomy) An oval yellow spot near the center of the retina of the human eye, histologically defined as having two or more layers of ganglion cells, responsible for detailed central vision. 2  A spot, as on the skin, or on the surface of the sun or of some other luminous orb. 3  A rather large spot or blotch of color.
934b89a1a766d2903ca3d2b1503b0cfa
How do we determine blood types? What are the tests done? Rh blood typing determines the presence (+) or absence (-) of the Rh antigen (also called the Rh factor). 1  If your red blood cells: 2  Contain the Rh antigen, your blood is Rh positive. 3  Do not contain the Rh antigen, your blood is Rh negative. 4  Contain the A and Rh antigens, your blood type is A positive (A+).
6541dfd6703d4fe92fd8368ad07a5ab9
5 Surprising Signs of Colon Cancer But according to research -- and to those who've been diagnosed with colon cancer -- there are also some surprising early signs of colon cancer to be aware of. People diagnosed with colon cancer often look back and realize they'd been struggling with mysterious digestive problems for some time.
c06ad1282fb342531638d0eec6c13938
Liver spot Histology slide of a solar lentigo. Liver spots (also known as age spot, solar lentigo, Lentigo senilis, Old age spot, Senile freckle) are blemishes on the skin associated with aging and exposure to ultraviolet radiation from the sun.
35d26e597d4624bbfd655839fb340c0e
- 1. An area that is sensitive to light and functions somewhat like an eye, found in certain single-celled organisms as well as many invertebrate animals. 2. A round marking resembling an eye, as on the tail feather of a peacock.yespot. n. 1. (Biology) a small area of light-sensitive pigment in some protozoans, algae, and other simple organisms. 2. (Biology) an eyelike marking, as on the wings of certain butterflies.
d91e2f83eae10fd259d4b6167a787c0e
Glossary of Eye Definitions and Eye Terms. An eye condition where the eye cannot focus light uniformly in all directions resulting from an irregular curvature of the cornea, the crystalline lens, or the eye itself. Astigmatism results in mild to moderately blurred vision and/or eyestrain.
90e67d44f7864f1f06c7fc7940165986
The Blind Spot The natural blind spot (scotoma) is due to lack of receptors (rods or cones) where the optic nerve and blood vessels leave the eye. There can also be artificial blind spots when something blocks light from reaching the photoreceptors, or when there is local adaptation of the retina as just after seeing a bright light. Blindness is absence of seeing.