Among the benign non-pigmented tumors- squamous papilloma  is the most common and among degenerationspterygium and pingueculas
are most common.
Several studies reported abnormalities of tear function tests in pinguecula
patients [2, 11].
and pterygium: histologic and electron microscopic study.
* nodular band keratopathies, pinguecula
, pterygium, photokeratitis, and epidermal carcinoma (cornea);
Other UV-related eye problems are pterygium and pinguecula
. A pterygium, called surfer's eye, occurs when the conjunctiva grows into the cornea.
The blood vessel dilator, dipyridamole, has demonstrated in early studies its effectiveness as a treatment for pterygium and early-stage pinguecula
, also known as 'surfer's eye.'
A strong relationship between UV radiation exposure and the eyelid cancers basal cell carcinoma and squamous cell carcinoma, photokeratitis, climatic droplet keratopathy, pterygium and cortical cataract development has been found, while the relationship between UV radiation and pinguecula
, nuclear and posterior subcapsular cataract, ocular surface squamous neoplasia, ocular melanoma and age-related macular degeneration is limited.
This is known as a pinguecula
. They cause no harm to the eye but don't look very nice and may become inflamed and itchy.