Eagleview Eye Clinic

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MEDIAL CANTHUS

The medial canthus is a part of the eye’s anatomy. Key features:

  1. Location: The inner corner of the eye where the upper and lower eyelids meet.
  2. Function:
    • Helps with eyelid stability and movement.
    • Contains the lacrimal puncta (openings for tear drainage).
  3. Clinical significance:
    • Can be involved in conditions like medial canthal tendon issues or injuries.
    • Sometimes a focus in oculoplastic surgery.

The term “media canthi” seems to be a plural reference to the medial canthus areas of both eyes.

LATERAL CANTHUS

The lateral canthus is a part of the eye’s anatomy. Key features:

  1. Location: The outer corner of the eye where the upper and lower eyelids meet.
  2. Function:
    • Helps with eyelid stability and movement.
    • Contributes to the overall shape and function of the eyelids.
  3. Clinical significance:
    • Can be involved in conditions like lateral canthal tendon laxity or injuries.
    • Sometimes a focus in oculoplastic surgery for cosmetic or functional reasons.

The lateral canthus is one of the anatomical landmarks of the eye.

OPTIC RADIATION

The optic radiations are part of the visual pathway. Key features:

  1. Location: Extend from the lateral geniculate nucleus in the thalamus to the visual cortex in the occipital lobe.
  2. Function:
    • Carry visual information from the lateral geniculate nucleus to the visual cortex.
    • Help process visual data like shape, color, and movement.
  3. Importance:
    • Damage to optic radiations can cause visual field defects.
    • Lesions can lead to specific types of visual loss depending on location.

The optic radiations play a crucial role in transmitting visual information to the brain’s visual cortex.

OPTIC CHIASM

The optic chiasm is a part of the visual pathway. Key features:

  1. Location: Located at the base of the brain, above the pituitary gland.
  2. Function:
    • Nerve fibers from the nasal part of each retina cross over (decussate) here.
    • Allows for integration of visual information from both eyes.
  3. Importance:
    • Plays a crucial role in binocular vision and visual field processing.
    • Lesions or damage to the optic chiasm can cause specific visual field defects (like bitemporal hemianopia).

The optic chiasm is a key structure in the visual pathway.

ANTERIOR CHAMBER ANGLE

The anterior chamber angle is a critical area in the eye. Key features:

  1. Location: The angle formed by the junction of the iris and cornea in the anterior chamber.
  2. Importance:
    • Contains the trabecular meshwork, which drains aqueous humor
    • Plays a key role in regulating intraocular pressure
  3. Clinical significance: Narrowing or closure of the anterior chamber angle can lead to angle-closure glaucoma.

The anatomy of the anterior chamber angle is important for understanding glaucoma and other ocular conditions.

TRABECULAE MESHWORK

The trabecular meshwork is a key structure in the eye. Key features:

  1. Location: Located near the base of the iris, in the angle of the anterior chamber.
  2. Function:
    • Drains aqueous humor from the eye
    • Regulates intraocular pressure by controlling outflow of aqueous humor
  3. Importance: Dysfunction or blockage of the trabecular meshwork can lead to increased intraocular pressure and conditions like glaucoma.

The trabecular meshwork plays a crucial role in maintaining healthy intraocular pressure.

AQUEOUS HUMOR

The aqueous humor is a clear fluid in the eye. Key features:

  1. Location: Fills the anterior chamber (between the cornea and iris) and posterior chamber (between the iris and lens).
  2. Function:
    • Maintains intraocular pressure
    • Provides nutrients to the lens and cornea
    • Removes waste products
  3. Production and drainage: Produced by the ciliary body, drained through the trabecular meshwork.

Imbalances in aqueous humor dynamics can lead to conditions like glaucoma.

GLAND OF MOLL

The Moll’s glands or glands of Moll. These are:

  1. Location: Small sweat glands located near the eyelashes, specifically in the eyelid margin.
  2. Function: They contribute to the secretion of sweat around the eye area.
  3. Clinical significance: Blockage or infection of these glands can lead to conditions like hordeolum (stye) or blepharitis.

The glands of Moll play a role in maintaining the health of the ocular surface and eyelid area.

GLAND OF MOLL

The Moll’s glands or glands of Moll. These are:

  1. Location: Small sweat glands located near the eyelashes, specifically in the eyelid margin.
  2. Function: They contribute to the secretion of sweat around the eye area.
  3. Clinical significance: Blockage or infection of these glands can lead to conditions like hordeolum (stye) or blepharitis.

The glands of Moll play a role in maintaining the health of the ocular surface and eyelid area.

THE GLÀND OF THE ZEIS

The Glands of Zeis are:

  1. Sebaceous glands: Associated with the eyelashes, producing sebum.
  2. Function: Help keep the eyelashes and surrounding skin healthy, moisturized.
  3. Location: Located near the base of the eyelashes.

Dysfunction or blockage of the Glands of Zeis can lead to conditions like:

  1. Styes (hordeolum)
  2. Chalazion
  3. Blepharitis (inflammation of the eyelids)

These glands play a role in maintaining eyelid and ocular surface health.