Optician

Eyecare professional, designs and adapts eyeglasses in accordance with measurements specific to each wearer. Professional who makes and adjusts optical aids, e.g., eyeglass lenses, from refraction prescriptions supplied by an ophthalmologist or optometrist.

Optical Coherence Tomography

Optical coherence tomography (OCT) is a noninvasive imaging technology used to obtain high resolution cross-sectional images of the retina. OCT is similar to ultrasound testing, except that imaging is performed by measuring light rather than sound. OCT measures the retinal nerve fiber layer thickness in glaucoma and other diseases of the optic nerve.

Ophthalmologist

Physician, surgeon specialized in the treatment of eye diseases, conditions and eyesight correction. Physician (MD) specializing in diagnosis and treatment of refractive, medical and surgical problems related to eye.