Retinal tracking assisted optical coherence tomography
Retinoscope
Retinoscope assembly with scale
Retinoscope with external control sleeve
Retinoscope with magnetic coupling
Retroilluminating indirect gonioprism
Ring laser photocoagulation
Ring laser photocoagulation
Ring location
Rotatable diagnostic lens for evaluation of the irido-corneal an
Rule based visual field autointerpretation system