Which of the following is not associated with a posterior vitreous detachment?

• A. Floaters
• B. Photopsia
• C. Decreased visual acuity
• D. Retinal tear

Answer: (C)

Posterior vitreous detachment happens as the gel-like vitreous shrinks and pulls away from the retina. This traction commonly causes new floaters and sometimes flashes of light (photopsia) as the retina is momentarily stimulated by the movement. A retinal tear can occur because the pulling vitreous can create a break in the retina, making that association a real risk. Decreased visual acuity, however, isn’t a typical feature of a simple PVD; if vision drops, it usually points to something more serious like macular involvement or a retinal detachment, which would require urgent evaluation. So, the symptom that doesn’t fit with a PVD is decreased visual acuity.