What is the function of the caruncle of the eye?

A caruncle is a fleshy outgrowth on a plant or animal. A caruncle’s function in a human eye is to moisturize the eye and protect it from bacteria. The reading mentions a “comb” because some birds have caruncles.

What connects the lens to the retina?

Suspensory ligament of lens. A series of fibers that connects the ciliary body of the eye with the lens, holding it in place.

Which structure of the eye absorbs light to prevent it from scattering within the eye?

choroid
The choroid, a membrane found between the sclera and the retina, lines the back of the eye. It contains many blood vessels that supply oxygen and nutrients to the retina, and is highly pigmented to help absorb light and prevent scattering.

What is the function of the retina?

The retina is a layer of photoreceptors cells and glial cells within the eye that captures incoming photons and transmits them along neuronal pathways as both electrical and chemical signals for the brain to perceive a visual picture.

What happens when the caruncle is swollen?

The swollen caruncle may impair fluid flow from the lacrimal gland to the punctum, triggering epiphora, although the nasolacrimal system is normal[3]–[4]. All the cases were conducted in accordance with the Declaration of Helsinki.

What is a caruncle lesion?

The caruncle is a modified cutaneous tissue located at the inner canthus that contains hair follicles, accessory lacrimal glands, sweat glands and sebaceous glands. These different types of tissues can give rise to a wide variety of lesions that make the clinical diagnosis difficult.

What holds the retina in place?

The vitreous itself is made of water and a substance called hyaluronic acid. The main purpose of the vitreous is to help hold the retina in place and acts as a shock absorber.

Which part of the eye focuses light onto the retina?

The lens
The lens works together with the cornea to focus light correctly on the retina. When light hits the retina (a light-sensitive layer of tissue at the back of the eye), special cells called photoreceptors turn the light into electrical signals.

What structure holds retina in place?

vitreous gel
This occurs naturally as your eyes converge to focus on objects closer than twenty feet away. Light then passes through the posterior cavity. This part is filled with the vitreous gel, a thick gelatinous substance, that does not regenerate with time. This supports the globe and holds the retina in place.

What are the 3 layers of the retina?

There are three primary layers in the retina that are made up of nerve cells or neurons. These are the photoreceptor cell layer, ganglion cell layer and bipolar cell layer.

What are the functions of optic nerve and retina?

The optic nerve, also known as the second cranial nerve, cranial nerve II, or simply CN II, is a paired cranial nerve that transmits visual information from the retina to the brain.

Can a caruncle be removed?

Urethral caruncle removal. If nonsurgical options don’t work, a surgeon can remove the growth under local anesthesia, sedation or general anesthesia. It’s important to note that, even with surgical removal, there’s still a chance for urethral caruncle recurrence (return).

Where is the lacrimal caruncle in the eye?

Caruncula visible and labeled at left. The lacrimal caruncle, or caruncula lacrimalis, is the small, pink, globular nodule at the inner corner (the medial canthus) of the eye. It consists of tissue types of neighbouring eye structures.

The retina is a layer of tissue that lines the back of the eye and that contains photoreceptors and processing machinery for visual information. The retina is responsible for processing light into neural signals and sending this information to the brain where it can be recognized.

What does a pigmented lesion on the caruncle mean?

This pigmented lesion of the caruncle is elevated due to small cysts (similar to lesions in the conjunctiva) with varying brownish pigmentation. Since pigmented lesions of the caruncle carry a risk of developing into a melanoma they should be observed regularly for potential growth.

What does melanocytic nevus of the caruncle mean?

Melanocytic Nevus of the Caruncle. This pigmented lesion of the caruncle is elevated due to small cysts (similar to lesions in the conjunctiva) with varying brownish pigmentation. Since pigmented lesions of the caruncle carry a risk of developing into a melanoma they should be observed regularly for potential growth.