Patient eye protection: ocular injury in dentistry is rare but almost always preventable

Operator eye protection has entered daily practice; patient eye protection remains optional in many practices, and is perceived more as a consideration than as a safety measure.

The documented risks are of three kinds. The first is falling instruments or materials: the patient lies supine beneath the working area, and any object slipping from the hand has a direct path towards the face.

The second is chemical splash. Etchant, hypochlorite, adhesives, disinfectants: substances producing immediate injury on the conjunctiva. Sodium hypochlorite used in endodontics is the case most described in the literature.

The third is debris projection during removal of old restorations or during finishing, where amalgam or composite fragments travel at high speed in unpredictable directions.

Overall incidence is low, but potential severity is high and prevention costs a few cents. It is the classic case where the ratio between the cost of the measure and the severity of the event makes the choice obvious.

Disposable shielding has a practical advantage over reusable models, concerning hygiene but also clarity: reusable glasses scratch with repeated disinfection, and a patient looking through a hazy lens becomes uneasy.

The principal selection criterion is lateral coverage. Flat glasses protect against the frontal path but leave the side exposed, which is the direction from which splash arrives when working on the contralateral quadrant.

Wraparound models also cover the outer canthus. They cost little more and address the case that occurs most often.

Bulk on the nasal bridge deserves attention because it conflicts with operative access. Glasses with a thick frame interfere with finger position in the upper anterior sector, and the operator ends up removing them — obtaining zero protection.

Single-shield models without a central frame resolve the problem and are also quicker to position.

For patients wearing prescription glasses the solution is not to have them removed but to place a shield over them. Prescription glasses already offer partial frontal protection but none laterally, and they are the surface the patient takes home.

In treatments involving a curing light, protection changes function: an orange shield filtering the blue wavelength is required. Clear glasses protect against splash but not against light, and repeated exposure to curing concerns above all the operator and the assistant.

In summary, patient eye protection is a negligible-cost measure against an infrequent but serious risk. It should be chosen wraparound, without a bulky frame, and orange when curing: three requirements that do not appreciably raise the price.