Pupils typically dilate in low light, but abnormal widening may be linked to medication, eye injury, or neurological issues.

Burning, stinging eyes often relate to dry eyes, allergies, or blepharitis, but if accompanied by significant redness, pain, light sensitivity, or blurred vision, it may signal a need for medical examination.

Gradual peripheral vision loss, eye pain, blurred vision, or seeing colored halos around light sources can be signs of glaucoma.

Mr. Nhan, 69, who has suffered from severe myopia since his teenage years, experienced a significant decline in vision due to cataracts.

Cataracts progressing to an advanced stage can alter the internal structure of the eye, obstructing aqueous humor drainage and leading to secondary glaucoma.

Ngoc, a 6-year-old girl, experienced intermittent outward eye deviation that quickly returned to normal, making it difficult for her family to notice any abnormality. Doctors have now diagnosed her with intermittent exotropia.

Regular eye exams, not smoking, healthy eating, and managing chronic conditions can protect vision in old age.

The primary causes of blindness have shifted from conditions like trachoma or vitamin A deficiency to the complex complications of diabetes and myopia.

Lupus can cause dry eyes, inflammation of the cornea, retina, sclera, or optic nerve, with some complications progressing rapidly if not detected promptly.

While viral and bacterial conjunctivitis share many similar symptoms, they differ in ocular discharge, accompanying signs, and transmissibility.

Adenovirus is a leading cause of conjunctivitis; if not treated properly and promptly, it can lead to inflammation, corneal scarring, and reduced vision.

An unusual white spot in the pupil helped a baby boy be diagnosed with retinoblastoma – the most dangerous eye cancer in children – at just five months old.

Dry eyes can cause temporary blurry vision because the tear film on the corneal surface is disrupted, preventing light from focusing stably on the eye.

Anh Dat, 29, who lost vision in his left eye as a child, recently experienced blurry vision in his right eye; doctors diagnosed retinal detachment caused by 6 diopters of myopia.