Question

Innermost layer of the human eye is
(A) Retina
(B) Lens
(C) Sclera
(D) Choroid
(E) Cornea

Answer 1

The innermost layer of the eye is light-sensitive tissue and the main function of this layer is to receive the light that the lens has focused and convert light into neural signals.

Complete step by step answer:
The innermost layer of the human eye is known as Retina. This is the layer of nerve cells lining the back of the eye.
The retina has a layer of photoreceptor cells which helps in processing light.
These are essentially light- sensitive cells, liable for detecting qualities like color and light-intensity. The retina processes the knowledge gathered by the photoreceptor cells and sends this information to the brain via the nervus opticus. The retina processes an image from the focused light, and therefore the brain is left to make a decision about what the image is.

Additional Information:
Due to the retina’s vital role in vision, damage thereto can cause permanent blindness. Conditions like detachment of the retina, where the retina is abnormally detached from its usual position, can prevent the retina from receiving or processing light. This prevents the brain from receiving this information, thus resulting in blindness. The retina is further divided into distinct layers, each containing specific cell types that have metabolisms with different nutritional requirements.
To satisfy these requirements, the arteria ophthalmica bifurcates and supplies the retina via two distinct vascular networks: the choroidal network, which supplies the choroid, and therefore the outer retina, and therefore the retinal network, which supplies the retina's inner layer.
So, the correct answer is ‘(A) Retina '.

Note:There are many inherited and acquired diseases or disorders that will affect the retina. few of them include: - Retinitis pigmentosa is a group of genetic diseases that affect the retina and cause the loss of vision at night and peripheral vision. - Macular degeneration describes a bunch of diseases characterized by loss of sight due to death or impairment of the cells within the macula. - Cone-rod dystrophy (CORD) describes a variety of diseases where vision loss is caused by the deterioration of the cones and/or rods within the retina.