retinal


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

retinal

 [ret´ĭ-nal]
1. pertaining to the retina.
2. the aldehyde of retinol, having vitamin A activity. One isomer (11-cis-retinal) combines with opsin in the retinal rods (scotopsin) to form rhodopsin (visual purple); another, all-trans-retinal, or visual yellow, results from the bleaching of rhodopsin by light, in which the 11-cis form is converted to the all-trans form. Retinal also combines with opsins in the retinal cones to form the three pigments responsible for color vision.

ret·i·nal

(ret'i-năl),
1. Relating to the retina.
2. Retinaldehyde, most commonly referring to the all-trans form; participates in the visual process; 11-cis-retinal binds with an opsin to form iodopsin or rhodopsin; light causes the formation of all-trans-retinal, which dissociates from the protein.

retinal 1

(rĕt′n-ăl′)
adj.
Of or relating to the retina of the eye.

retinal 2

(rĕt′n-ăl′, -ôl′)
n.
Either of two chromophores that are aldehydes of vitamin A1 and vitamin A2 and that bind covalently with an opsin protein to form rhodopsin or porphyropsin. Also called retinene.

retinal

adjective Referring to the retina noun 11-cis-retinal, vitamin A aldehyde A retinal pigment that absorbs visible light at 400-600 nm, resulting in an isomeric transition of the 11-cis-retinal moiety to a trans-retinal conformation causing a G protein-mediated depolarization event

ret·i·nal

(ret'i-năl)
1. Relating to the retina.
2. Retinaldehyde; most commonly referring to the all-trans form.

retinal

The aldehyde found in visual pigments, such as visual purple. Also known as retinaldehyde.

retinal 

1. Pertaining to the retina.
2. See rhodopsin.
References in periodicals archive ?
'We are excited about the potential of ONL's Fas inhibition platform to address some major unmet medical needs in retinal disease,' said Ron Weiss, Managing Partner of InFocus Capital Partners.
Gupta gives this example to explain how a rhegmatogenous retinal detachment occurs: "Imagine that, if there were a tear in the wallpaper of your bathroom and it were left unaddressed, over time, as you took showers in the bathroom, the steam would get behind the tear and cause the entire wallpaper to start peeling.
[2] It has developed a retinal imaging device, but also offers the tools and support to enable practices to use retinal and eye health to differentiate and prosper
BioTime's three-dimensional retinal tissue technology would address a wide range of severe retinal degenerative conditions (e.g., retinitis pigmentosa and advanced forms of AMD) through a retinal tissue restoration strategy.
OpRegen is a retinal pigment epithelium transplant therapy in Phase l/2a development for the treatment of dry AMD, the leading cause of adult blindness in the developed world.
'The Apldeap Foundation delivered our first retinal camera outside of Manila to Davos [Davao City].
According to the trial sponsor, UK biotechnology company ReNeuron, pre-clinical studies have demonstrated that retinal implantation of human retinal progenitor cells (hRPC) have the potential to preserve existing photoreceptors, potentially reducing or halting further deterioration of vision.
Optical coherence tomography findings in idiopathic juxtafoveal retinal telangiectasis.
Microvascular occlusion can lead to retinal hypoxia, ischaemia, infarction and neovascularisation.
The retina may become detached because it has one or more holes (retinal tears) forming in the outer part of the retina that allows the vitreous (the jelly-like fluid substance within the eye) to pass underneath it and lift it off.
The patient in this report presented with vitritis, retinal hemorrhages, vascular leakage, and capillary infarct in FA, which were suggestive of obstructive retinal vasculitis due to rheumatologic diseases or viral retinitis.

Full browser ?