glossary

A technique of recording electrical impulses from the contraction of a muscle. It is used to confirm the correct position of the needle when botulinum toxin is used to correct strabismus.

A test that measures the electrical activity of the retina when exposed to flashes of light of varying intensity. Abnormalities in the electroretinogram typically occur in conditions that affect the photoreceptor cells (e.g. retinitis pigmentosa).

Corrects eyesight disorders and is a combination of material, optical surface and coatings.