A 50-year-old woman with advanced lung cancer developed a rare fungal eye infection caused by Cryptococcus neoformans, resulting in blurred vision. Doctors diagnosed this through eye surgery and fluid analysis, then treated her with strong antifungal medications both injected into the eye and given systemically. After 10 months of treatment, her vision significantly improved, showing that early detection and aggressive antifungal therapy are critical for preventing blindness from this rare infection.