Polyvinyl alcohol (PVA) is a synthetic polymer commonly used in ophthalmic preparations, particularly as a component of artificial tears and lubricating eye drops. Its primary function in treating scratches and abrasions—specifically, minor corneal abrasions or superficial ocular surface injuries—is to provide lubrication and moisture to the eye, thereby reducing discomfort and supporting the natural healing process. Scientific studies have demonstrated that PVA-containing eye drops can stabilize the tear film and reduce friction between the eyelid and the ocular surface, which is beneficial in conditions where the corneal epithelium is damaged.

PVA has no direct wound-healing or antimicrobial properties, but by creating a moist environment, it can facilitate epithelial repair and improve patient comfort. Clinical guidelines, including those from the American Academy of Ophthalmology, mention the use of lubricating drops as supportive care for minor corneal abrasions. However, the evidence is mainly for symptomatic relief rather than direct enhancement of tissue repair. Studies comparing PVA-based lubricants to other agents (e.g., carboxymethylcellulose) show similar efficacy in symptom control.

In summary, there is moderate scientific evidence supporting the use of polyvinyl alcohol as a supportive treatment for scratches and abrasions of the eye due to its lubricating properties, but it is not a primary healing agent.