query: What is the diameter of the human eye?
passage: Human eye
Dimensions typically differ among adults by only one or two millimetres, remarkably consistent across different ethnicities. The vertical measure, generally less than the horizontal, is about 24mm. The transverse size of a human adult eye is approximately 24.2mm and the sagittal size is 23.7mm with no significant difference between sexes and age groups. Strong correlation has been found between the transverse diameter and the width of the orbit (r = 0.88).[4] The typical adult eye has an anterior to posterior diameter of 24 millimetres, a volume of six cubic centimetres (0.4 cu. in.),[5] and a mass of 7.5 grams (weight of 0.25 oz.)..
passage: Buphthalmos
Infantile glaucoma, which often produces the clinical sign of buphthalmos, can be caused when an abnormally narrow angle between the cornea and iris blocks the outflow of aqueous humor; this causes increased intraocular pressure and eventual enlargement of the globe (eyeball). Angle closure can be caused by developmental abnormalities of the eye as well as the presence of abnormal structures within the vitreous.
Corneal diameter of greater than 11mm before the age of one year or corneal diameter greater than 13mm at any age are diagnostic criteria for buphthalmos.