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what is optic chiasma this structure makes upto portion of the anterior inferior floor of the third ventricle it is shaped like a flat oblong
what is optic nerve the optic nerve contains more than one million axons that initiate in the ganglion cell layer of the retina this structure
how many layers in retinathe retina is composed of ten layersa pigmented epithelium outermost layerb neusoepithelium rods and
describe in detail about retina the retina is a highly complex layer of nervous tissue the photoreceptors are rods and cones for scotopic and
what are the physical properties of tear filmphysical properties of tear film the tear film is a three-layered structure as given below1 outermost
what factors causing short-term changes in intra-ocular pressure1 arterial blood pressure2 systemic venous pressure svp3 mechanical pressure4 plasma
illustrate about the intra-ocular pressureit is the pressure maintained inside the eye above the atmospheric pressure it is higher than fluid
state about the blood-aqueous barrierthere is a blood-aqueous barrier which prevents the movement of substances from the plasma to the aqueous humour
define the term -aqueous movement and outflow there are two movements of the aqueous humour that occur-thermal flow and bulk flow thermal flow is an
what is active transport--secretion this method is now a well accepted process of aqueous formation the rate of aqueous humour formation depends on
explain the term-diffusiondiffusion occurs from the side of greater concentration to the side of lesser concentration in aqueous humour this occurs
define the term- ultrafiltrationultrafiltration occurs when the flow of a substance across a cell membrane is increased by a hydrostatic pressure
formation of aqueous humourit is universally accepted that the aqueous is produced by the ciliary processes although
illustrate the structure and functions of aqueous humouraqueous humour is a clear fluid that fills the anterior and posterior chambers of the eye and
define the control of tear productioncontrol of tear production the lacrimal secretary system was initially thought to be comprised of two parts
contrast sense sense of contrast is the ability to perceive slight changes in luminance between regions which are not separated by definite borders
state in detail about dark adaptationdark adaptation is a phenomenon by which retina and pupil react to decreased illumination test is performed
define the term- adaptation the terms scotopic and photopic vision are relative to the lighting conditions of an individual place light adaptation is
explain about the light senseyou must be aware that when you enter into a cinema hall you are unable to see and
what do you mean by blinking and peering in the eyelidblinking and peering blinking considers as to the opening and closing movements of the eyelid
explain about the physiology of eyelid movementsphysiology of eyelid movementsit is quoted that the eyelids move more than any other part of the body
what are the functions of the eyelidsfunctions of the eyelidsthe eyelid makes the outer most layers covering the eye because of its strategic
define the objectives of eyelids lacrimal apparatus and tear film dynamicsby familiar with section you should be capable to understanda all the
explain the blood vitreous barrier as the physio-chemical propertyblood vitreous barrierthe blood vitreous barrier consists of three components tight
define about the ishiharas plates of eyesishiharas plates following plates are available- transformation vanishing hidden digit and diagnostic