The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. source
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber.
The cornea, with the anterior chamber and lens, refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power. source
The cornea, with the anterior chamber and lens, refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power.
In humans, the refractive power of the cornea is approximately 43 dioptres. source
In humans, the refractive power of the cornea is approximately 43 dioptres.
While the cornea contributes most of the eye's focusing power, its focus is fixed. source
While the cornea contributes most of the eye's focusing power, its focus is fixed.
Medical terms related to the cornea often start with the prefix "kerat-" from the Greek word κέρας, horn. source
Medical terms related to the cornea often start with the prefix "kerat-" from the Greek word κέρας, horn.
The cornea has unmyelinated nerve endings sensitive to touch, temperature and chemicals. source
The cornea has unmyelinated nerve endings sensitive to touch, temperature and chemicals.
A touch of the cornea causes an involuntary reflex to close the eyelid. source
A touch of the cornea causes an involuntary reflex to close the eyelid.
Instead, oxygen dissolves in tears and then diffuses throughout the cornea to keep it healthy. source
Instead, oxygen dissolves in tears and then diffuses throughout the cornea to keep it healthy.
In humans, the cornea has a diameter of about 11.5 mm and a thickness of 0.5–0.6 mm in the center and 0.6–0.8 mm at the periphery. source
In humans, the cornea has a diameter of about 11.5 mm and a thickness of 0.5–0.6 mm in the center and 0.6–0.8 mm at the periphery.
Transparency, avascularity, the presence of immature resident immune cells, and immunologic privilege makes the cornea a very special tissue. source
Transparency, avascularity, the presence of immature resident immune cells, and immunologic privilege makes the cornea a very special tissue.
The most abundant soluble protein in mammalian cornea is albumin. source
The most abundant soluble protein in mammalian cornea is albumin.
The human cornea borders with the sclera via the corneal limbus. source
The human cornea borders with the sclera via the corneal limbus.
In lampreys, the cornea is solely an extension of the sclera, and is separate from the skin above it, source
In lampreys, the cornea is solely an extension of the sclera, and is separate from the skin above it,
In fish, and aquatic vertebrates in general, the cornea plays no role in focusing light, since it has virtually the same refractive index as water. source
In fish, and aquatic vertebrates in general, the cornea plays no role in focusing light, since it has virtually the same refractive index as water.
The human cornea has five (possibly six(dua's layer)) layers. source
The human cornea has five (possibly six(dua's layer)) layers.
Corneas of other primates have five known layers. source
Corneas of other primates have five known layers.
The corneas of cats, dogs, wolves, and other carnivores only have four. source
The corneas of cats, dogs, wolves, and other carnivores only have four.
From the anterior to posterior the layers of the human cornea are. source
From the anterior to posterior the layers of the human cornea are.
Corneal epithelium: an exceedingly thin multicellular epithelial tissue layer (non-keratinized stratified squamous epithelium). source
Corneal epithelium: an exceedingly thin multicellular epithelial tissue layer (non-keratinized stratified squamous epithelium).
Irregularity or edema of the corneal epithelium disrupts the smoothness of the air/tear-film interface. source
Irregularity or edema of the corneal epithelium disrupts the smoothness of the air/tear-film interface.
Each layer is 1.5-2.5 μm. Up to 90% of the corneal thickness is composed of stroma. source
Each layer is 1.5-2.5 μm. Up to 90% of the corneal thickness is composed of stroma.
There are 2 theories of how transparency in the cornea comes about. source
There are 2 theories of how transparency in the cornea comes about.
Upon death or removal of an eye the cornea absorbs the aqueous humor, thickens, and becomes hazy. source
Upon death or removal of an eye the cornea absorbs the aqueous humor, thickens, and becomes hazy.
Corneal abrasion - a medical condition involving the loss of the surface epithelial layer of the eye's cornea as a result of trauma to the surface of the eye. source
Corneal abrasion - a medical condition involving the loss of the surface epithelial layer of the eye's cornea as a result of trauma to the surface of the eye.
