Blurred vision
Blurred vision or fuzzy vision was a medical condition where one's eyesight fails to see fine detail.
In 2152, Doctor Phlox asked Travis Mayweather if his headache was accompanied by dizziness or blurred vision.(ENT: "Singularity")
In 2370, Dr. Beverly Crusher asked if a dizzy Worf was experiencing nausea or blurred vision. (TNG: "Parallels")
Later that year, Reginald Barclay listed several of his symptoms to Dr. Crusher: blurred vision, dizziness, palpitations, and a stinging sensation in the lower spine, certain they indicated Terellian Death Syndrome. Thankfully, he only had a mild case of Urodelan flu. (TNG: "Genesis")
In 2373, a terminally injured Belle described everything she saw as being blurry. (VOY: "Real Life")