45 results found

Search Results for: retina

Tigroid retina

tigroid retina --> tessellated fundus A normal fundus to which a deeply pigmented choroid gives the appearance of dark... Read More

Retina

retina light sensitive layer of the eye. In vertebrates, looking from outside, there are four major cell layers: (i) the... Read More

Retinal

retinal 1. (Science: anatomy) Pertaining to the retina. 2. (Science: biochemistry) The aldehyde of retinol, derived by the... Read More

Human Perception – Neurology

A better understanding of human perception unlocks the key to how the mind works, an advantage when working with people with... Read More

Pupillary light reflex

Definition noun, plural: pupillary light reflexes A reflex marked by the constriction of the pupil in response to the... Read More

Tapetum lucidum

Definition noun, plural: tapeta lucida A layer of tissue in the choroid or in the retinal pigment epithelium of the eye of... Read More

Floater

Definition noun, plural: floaters (ophthalmology) One or more spots or threadlike specks that seem to float or move in one's... Read More

Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal and... Read More

Young-helmholtz theory of colour vision

'''Young-helmholtz theory of color vision A theory that there are three perceiving elements in the retina: red, green, and... Read More

Wagners disease

Definition noun (pathology) A degenerative condition of the vitreous and retinal parts of the eye, and may eventually lead... Read More

Tapetum

Definition noun, plural: tapeta (botany) A layer of nutritive cells within the sporangium, providing nutrition for growing... Read More

Wagners syndrome

Definition noun (1) A degenerative condition of the vitreous and retinal parts of the eye, and may eventually lead to... Read More

Vitreous humor

Definition noun The clear, gel-like body fluid in the vitreous chamber, i.e. the posterior cavity between the lens and the... Read More

Sclerotome

Definition noun, plural: sclerotomes (embryology) The somite that gives rise to the development of vertebrae and... Read More

Fiber

Definition noun, plural: fibers (1) (anatomy) any elongated, thread-like structure, e.g. nerve fiber (2) (botany) A cell... Read More

Punctum caecum

Definition noun A region in the retina that does not contain photoreceptors thus leads to the normal blind spot in the... Read More

Sense organ

Definition noun, plural: sense organs An organ or structure that has nerve endings capable of detecting and reacting to a... Read More

Macula lutea

Macula lutea An oval area in the retina, 3 to 5 mm in diameter, usually located temporal to the posterior pole of the eye... Read More

Polyol

Definition noun plural: polyols pol•y•ol, ˈpɒlɪɒl A polyhydric alcohol, i.e. an alcohol containing three or more... Read More

Accommodation reflex

Definition noun, plural: accommodation reflexes A reflex reaction of the eye in response to focusing on near object followed... Read More

Hyaloid canal

Hyaloid canal a minute canal running through the vitreous from the discus nervi optici to the lens, containing in foetal... Read More

Human Neurology

Human Neurology deals essentially with the nervous system of humans. It also features the various theories put forward by... Read More

Neurology of Illusions

As mentioned in the previous tutorial, Human Perception, illusions can be caused by mental disorders or misreading of the... Read More

Blindness – Evolutionary regression? Maybe not!

The recent Netflix's hit flick, Bird Box, surely startled the viewers with the thrilling scenarios revolving around the... Read More

Retinol

Definition noun A yellow, fat-soluble vitamin with a formula: C20H30O, present in fish oils and green vegetables, and... Read More

Nervous System

    THE is the most complicated and highly organized of the various systems which make up the human body. It is the... Read More

Coenzyme

Enzymes can break down complicated large molecules into simpler smaller ones, they can combine small molecules or atoms to... Read More

Oxytocin

Definition noun, plural: oxytocins An antidiuretic peptide hormone (chemical formula: C46H66N12O12S2) produced chiefly by... Read More

Optical

optical 1. Of or pertaining to vision or sight. The moon, whose orb through optic glass the tuscan artist views. (milton) 2.... Read More

Cornea

Cornea (Science: anatomy, ophthalmology) The transparent structure forming the anterior part of the fibrous tunic of the... Read More

Terrys syndrome

Terry's syndrome --> retinopathy of prematurity (Science: ophthalmology, paediatrics) A bilateral retinopathy occurring... Read More

Fulcrum

Fulcrum Origin: L, bedpost, fr. Fulcire to prop. 1. A prop or support. 2. (Science: mechanics) That by which a lever is... Read More

Mach line

Mach line The apparent line of contrasting density bordering a soft tissue shadow on a radiograph; it is an optical illusion... Read More

Undulatory

undulatory moving in the manner of undulations, or waves; resembling the motion of waves, which successively rise or swell... Read More

Quadrantanopia

Definition noun, plural: quadrantanopias A visual field defect characterized by a loss of vision in a quarter section of the... Read More

Dopamine

Definition noun, plural: dopamines 3,4-dihydroxyphenethylamine (chemical formula: C8H11NO2); a neurotransmitter or a hormone... Read More

Intermediate host

Intermediate Host Definition When looking at the relationships amongst different biological members of our biosphere, we... Read More

Felidae

Definition noun A taxonomic family of Carnivora embracing domestic and wild cats such as lions and tigers Supplement Felidae... Read More

Sorbitol

Definition noun plural: sorbitols sor·bi·tol, ˈsɔr bɪˌtɔl A sugar alcohol with a sweet taste, occurs naturally in... Read More

Myopia

Myopia (Science: ophthalmology) That error of refraction in which rays of light entering the eye parallel to the optic axis... Read More