sight

What are the three layers of the eye?

Fibrous tunic, vascular tunic, and sensory tunic.

What is the function of the sclera?

It provides structure and support to the eye.

What is the role of the cornea?

It allows light to pass through and provides initial focusing.

What is the ciliary body responsible for?

It changes the shape of the lens for accommodation.

What is the vitreous humor?

A jelly-like substance that holds the retina in place and maintains intraocular pressure.

What is accommodation in the context of vision?

The process of changing the shape of the lens to focus on near or distant objects.

What causes cataracts?

Factors like smoking, congenital issues, and vitamin deficiencies.

What is the function of the retina?

It contains photoreceptors that detect light and convert it into neural signals.

What is the significance of the optic chiasm?

It is where visual information from both eyes crosses to the opposite side of the brain.

What is the suprachiasmatic nucleus responsible for?

It maintains circadian rhythms.

What is color blindness?

A condition where individuals have difficulty distinguishing certain colors, often congenital.

What are common causes of conjunctivitis?

Inflammation caused by viruses, bacteria, or allergies.

What is myopia?

A condition where distant objects appear blurry due to the eyeball being too long.

What is hyperopia?

A condition where close objects appear blurry due to the eyeball being too short.

What is the role of the lens in the eye?

It focuses light onto the retina.

What is the primary visual cortex responsible for?

Processing visual information received from the retina.

What happens in the case of a lesion in the left optic nerve?

It results in decreased vision in the left eye.

What is bitemporal hemianopsia?

A visual field defect where peripheral vision is lost in both eyes.

What is the function of the ciliary processes?

They secrete aqueous humor and help maintain intraocular pressure.

What is the significance of the fovea centralis?

It is the area of the retina with the highest visual acuity.

What is the role of the choroid layer?

It provides blood supply to the retina and absorbs excess light.

What is the difference between rods and cones?

Rods are responsible for low-light vision, while cones are responsible for color vision.

What is the function of the aqueous humor?

It maintains intraocular pressure and provides nutrients to the eye.

What is presbyopia?

A condition associated with aging where the lens loses elasticity, making it difficult to focus on close objects.

What is the role of the optic radiation?

It transmits visual information from the lateral geniculate nucleus to the visual cortex.

What is the significance of the corpus callosum in vision?

It allows communication between the left and right hemispheres of the brain regarding visual information.

What is the function of the tarsal glands?

They secrete oils that help lubricate the eyelids and prevent tear evaporation.