- 20-20-20 rule adherence rate
- average retinal thickness
- DMEK DSAEK rejection rate
- number of retinal nerve fibers in human optic nerve
- radial keratotomy
- radial nerve (ophthalmic)
- radiant warmer
- radiation keratopathy
- radiation therapy simulator
- radiofrequency ablation catheter
- radius in contact lenses
- radius of curvature
- range of accommodation
- ranibizumab
- raphe (retinal)
- rapid infuser
- rapid testing analyzer
- ray in optics
- raynauds phenomenon
- reactive pupils
- reading addition (ADD)
- reading field
- reading glasses
- reading glasses daily use
- reading segment
- reading slit
- recession (muscle)
- reconstituted medication
- reconstruction (orbital)
- rectangle frame style in eyewear
- recurrence rate (AMD)
- recurrent anterior uveitis
- recurrent corneal erosion
- recurrent ulcer
- red eye
- red eyes prevalence
- red filter test
- redgreen blindness
- redness relief drops weekly use
- re-do (lens)
- reduced visual acuity
- re-epithelialization
- reference markings
- reference sphere
- refining the cylinder axis
- reflected glare
- reflection in optics
- reflective sunglasses in eyewear
- reflex blepharospasm
- reflex hammer (ocular)
- reflex pathway
- reflex tear production
- reflex tearing in cold wind
- refraction in an eye exam
- refraction test
- refractive amblyopia
- refractive asthenopia
- refractive balance
- refractive correction
- refractive cylinder
- refractive diplopia
- refractive error
- refractive error diagnosis in children
- refractive hyperopia
- refractive index
- refractive keratitis
- refractive lens exchange
- refractive myopia
- refractive spasm
- refractive surface
- refractive surgery
- refractive zone
- reinforced bridge frame in eyewear
- reisbcklers dystrophy
- relative magnification
- remote visual acuity
- renal replacement therapy machine
- repeat keratoplasty re-graft
- resectoscope
- residual astigmatism
- respiratory syncytial virus
- respirometer
- restless legs syndrome rls
- restrictive strabismus
- retainer strap for eyeglasses
- reticule
- retina
- retinal artery occlusion
- retinal atrophy
- retinal blood vessel damage from diabetes
- retinal blood vessels
- retinal break
- retinal capillaritis
- retinal correspondence
- retinal correspondence
- retinal cyst
- retinal degeneration
- retinal detachment
- retinal detachment early symptoms
- retinal detachment risk after cataract surgery
- retinal detachment risk in myopia
- retinal detachment surgery failure rate
- retinal detachment vision recovery percentage
- retinal displacement
- retinal dystrophy
- retinal edema
- retinal embolus
- retinal folds
- retinal function tester
- retinal hemangioma
- retinal hemorrhage
- retinal image size
- retinal imaging
- retinal implant
- retinal ischemia
- retinal maculopathy
- retinal mapping
- retinal microaneurysms
- retinal microstructure
- retinal neovascular membrane
- retinal neovascularization
- retinal nerve fiber layer
- retinal oct scan
- retinal periphlebitis
- retinal pigment changes
- retinal pigment epithelium
- retinal pigmentation
- retinal rivalry
- retinal scar
- retinal sensitivity
- retinal tear
- retinal thickness map
- retinal toxicity
- retinal traction
- retinal undulation
- retinal vasculature
- retinal vein occlusion
- retinaldehyde eye cream
- retinas plexiform layer
- retinitis
- retinitis pigmentosa
- retinitis pigmentosa (RP)
- retinitis vasculitis
- retinoblastoma
- retinoblastoma for children
- retinochoroiditis
- retinol eye cream
- retinopathy of prematurity
- retinoschisis
- retinoscope
- retraction syndrome
- retro illumination
- retrobulbar hemorrhage
- retrobulbar injection
- retrobulbar neuritis
- retrolental fibroplasia rlf
- retrolental space
- retroscopic tilt
- reverse slab off prism
- rewetting drops
- rewetting drops daily use percentage
- rhabdomyosarcoma
- rhabdomyosarcoma orbital
- rhegmatogenous retinal detachment
- rheumatoid arthritis
- rheumatoid arthritis eye symptoms percentage
- rhinorrhea tear
- rho kinase inhibitor
- rhodopsin
- rhomboid (optic)
- rhomboideus (muscle)
- ribbon keratopathy
- ribbon synapse
- rigid sigmoidoscope
- rim lock design in eyewear
- rim lock on eyeglass frames
- rima glottidis
- rima palpebrarum
- rimless eyeglass screw mount
- ring maculopathy
- ring retractor
- rinse contacts with tap water rate
- rivet hinge on eyeglasses
- rivetless frame in eyewear
- robotic surgical system
- rod function test
- rod monochromatism
- rodcone dystrophy
- Role Of Limbal Stem Cells
- rolled edge on lenses
- rosacea
- rosacea keratitis
- rose bengal
- rose bengal stain
- rotational stability in contact lenses
- rotational thromboelastometry machine
- round frame style in eyewear
- round seg bifocal
- rub rinse method
- rubeosis iridis
- ruptured globe
- rx wraparound eyeglass lens