Superior Orbital Fissure Anatomy Quiz

Cornea Power

• The cornea has an approximate refractive power of 43 diopters.

Megalocornea

• Megalocornea is not caused by increased intraocular pressure. It is a congenital condition characterized by an abnormally large cornea.

Sclera-Cornea Junction

• The junction between the sclera and cornea is known as the limbus.

Cornea Nerve Supply

• The cornea is supplied by the long ciliary nerves, which are branches of the nasociliary nerve.

Lamina Fusca

• The lamina fusca is a layer of pigmented connective tissue that protects the eye from excessive light and contributes to the eye's structural integrity.

Tear Layer with Immunoglobulin A

• The mucin layer of the tear film contains immunoglobulin A, which plays a role in immune defense against pathogens.

Aqueous Tear Layer Contributors

• The lacrimal gland is the primary contributor to the aqueous layer of the tear film.

Medial Orbital Wall Bones

• The ethmoid bone is not part of the medial orbital wall. The medial wall is primarily formed by the ethmoid, lacrimal, and sphenoid bones.

Structures Not Passing Through Superior Orbital Fissure

• The optic nerve does not pass through the superior orbital fissure. It passes through the optic canal.

Human Color Vision

• Trichromatic vision is the term for human color vision, which is characterized by the presence of three types of cone photoreceptors sensitive to different wavelengths of light.

Protanopia

• Protanopia is a type of red-green color blindness where the individual lacks the red-sensitive cone photoreceptors.

Most Common Color Vision Deficiency

• Deuteranomaly, a form of red-green colorblindness where there is a reduced sensitivity to green light, is the most common type of color vision deficiency.

Radial Keratotomy Correction

• Radial keratotomy is a surgical procedure that corrects myopia, a refractive error where distant objects appear blurry.

Compound Hypermetropic Astigmatism

• In compound hypermetropic astigmatism, both the focal points are located behind the retina.

Myopia Complications

• Glaucoma is not a complication of myopia. Glaucoma is a condition that damages the optic nerve, while myopia is a refractive error.

6/6 Letter Subtension Distance

• The letter 6/6 will subtend an angle of 5 minutes of arc at a distance of 6 meters from the patient.