What condition is indicated by the presence of yellowish deposits in the conjunctiva?

The presence of yellowish deposits in the conjunctiva is indicative of pingueculae. Pingueculae are small raised, yellowish lesions that develop on the conjunctiva, commonly on the nasal side, and are made up of degenerated collagen that often occurs due to ultraviolet light exposure, resulting in changes to the conjunctival tissue.

These lesions can be a normal part of aging and are not associated with inflammation or infection, which distinguishes them from conditions like conjunctivitis. In contrast, chalazia are blocked oil glands in the eyelid and present as a lump but do not appear as yellowish deposits on the conjunctiva. Pterygium, another condition involving conjunctival growth, typically extends onto the cornea and is often associated with irritation and redness rather than simple yellow discoloration. Therefore, the characteristic appearance and location of pingueculae are what directly link them to the presence of yellowish deposits in the conjunctiva.