Development of tunnel vision that occurs due to loss of peripheral vision.
This manifests as a gradual loss of the visual field, starting with a loss of peripheral vision, but eventually the entire vision will be lost if not treated. […] Peripheral vision is affected first, but eventually the entire vision will be lost if not treated. […] Because the microscopic passageways are blocked, the pressure builds up in the eye and causes imperceptible very gradual vision loss.
Craniopharyngioma (Erdheim tumor) is a rare, benign neoplasm, that develops from epithelium derived from Rathke's pouch and usually affects children. This tumor-type is one that exhibits slow growth. The symptoms often show insidiously and they do not become obvious until the tumor has attained a diameter of about…
Pituitary neoplasms are benign adenomas in the vast majority of cases and can secrete pituitary hormones such as prolactin and growth hormone. Symptoms include a headache and bitemporal hemianopsia in larger tumors, while hormone-induced effects such as acromegaly, galactorrhea, and Cushing's disease may be…
In many cases, the individuals experience no symptoms if the tumor has not grown in size. In the rest, pituitary adenomas present the following signs and symptoms: Cushing’s syndrome Hyperthyroidism Decreased sexual function in males Changes in vision Lethargy Acromegaly Fatigue Headache Nausea accompanied by…
Inorganic mercury poisoning is a clinical condition where there is a pathologic accumulation of mercury in the blood stream. Inorganic mercury is usually derived from used batteries, cinnabar preparations and common disinfectants. The advertent accumulation of inorganic mercury in the blood affects the brain and lead…
Chiasmal syndrome is the set of signs and symptoms that are associated with lesions of the optic chiasm, manifesting as various impairments of the sufferer's visual field according to the location of the lesion along the optic nerve. Pituitary adenomas are the most common cause; however, chiasmal syndrome may be…
Macular degeneration never causes loss of peripheral vision.