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Optic nerve hypoplasia (ONH) is a congenital condition in which the optic nerve is underdeveloped (small). Many times, de Morsier’s Syndrome or septo-optic dysplasia (SOD) is associated with ONH, however, it is possible to have ONH without any additional issues like SOD. SOD is a condition that can involve multiple problems in the midline ...
v. t. e. In neuroanatomy, 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. In humans, the optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell ...
Congenital blindness is a hereditary disease and can be treated by gene therapy. Visual loss in children or infants can occur either at the prenatal stage (during the time of conception or intrauterine period) or postnatal stage (immediately after birth). [3] There are multiple possible causes of congenital blindness.
Specialty. Oncology. An eye neoplasm is a tumor of the eye. [ 1] A rare type of tumor, [ 2] eye neoplasms can affect all parts of the eye, and can either be benign or malignant ( cancerous ), in which case it is known as eye cancer. [ 3] Eye cancers can be primary (starts within the eye) or metastatic cancer (spread to the eye from another organ).
Genetic ( autosomal recessive) [ 1] Frequency. 1 in 40,000 newborns [ 1] Leber congenital amaurosis ( LCA) is a rare inherited eye disease that appears at birth or in the first few months of life. [ 2] It affects about 1 in 40,000 newborns. [ 1] LCA was first described by Theodor Leber in the 19th century. [ 3][ 4] It should not be confused ...
29271-4. An eye examination, commonly known as an eye test[ 1], is a series of tests performed to assess vision and ability to focus on and discern objects. It also includes other tests and examinations pertaining to the eyes. Eye examinations are primarily performed by an optometrist, ophthalmologist, or an orthoptist .
Dilated fundus examination ( DFE) is a diagnostic procedure that uses mydriatic eye drops to dilate or enlarge the pupil in order to obtain a better view of the fundus of the eye. [ 1] Once the pupil is dilated, examiners use ophthalmoscopy to view the eye's interior, which makes it easier to assess the retina, optic nerve head, blood vessels ...
Pupillary light reflex. Variation in the size of the pupil in bright (left) and dim (right) environments. In this case the pupil is 3 mm in diameter on the left, and 9 mm on the right. The pupillary light reflex ( PLR) or photopupillary reflex is a reflex that controls the diameter of the pupil, in response to the intensity ( luminance) of ...