Open-Angle Glaucoma
Open-angle glaucoma, also known as primary open-angle glaucoma (POAG), is a chronic, progressive optic neuropathy characterized by increased intraocular pressure (IOP) and subsequent damage to…
Onychomycosis Due to Dermatophyte
Onychomycosis, medically referred to as tinea unguium, is a fungal infection of the nail unit caused predominantly by dermatophytes. These pathogenic fungi invade the nail…
Onchocerciasis
Onchocerciasis, commonly referred to as river blindness, is a neglected tropical disease (NTD) caused by the filarial parasitic worm Onchocerca volvulus. It is transmitted to…
Omphalitis of Newborn
Omphalitis of the newborn refers to an acute, potentially life-threatening bacterial infection of the umbilical stump. It typically manifests within the first two weeks of…
Oligodendroglioma
Oligodendroglioma is a rare, slow-growing primary brain tumor originating from oligodendrocytes—the glial cells responsible for producing myelin in the central nervous system. These tumors are…
Oligoarticular Juvenile Idiopathic Arthritis
Oligoarticular juvenile idiopathic arthritis (JIA) is the most common subtype of juvenile idiopathic arthritis, a chronic autoimmune disorder affecting children under the age of 16.…
Ocular Symptoms Associated with Allergic Rhinitis
Allergic rhinitis, commonly known as hay fever, is a hypersensitivity reaction of the nasal mucosa to allergens such as pollen, dust mites, pet dander, or…
Ocular Surface Squamous Neoplasia (OSSN)
Ocular Surface Squamous Neoplasia (OSSN) encompasses a spectrum of dysplastic and neoplastic lesions of the conjunctiva and cornea, ranging from mild epithelial dysplasia to invasive…
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Ocular Rosacea
Ocular rosacea is a chronic, inflammatory eye condition associated with facial rosacea. It primarily affects the eyes and eyelids, often presenting as redness, burning, dryness,…