Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
Find Dr. Johnston's expertise for a condition
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- Distinguished
- Age-Related Macular Degeneration (ARMD)Dr. Johnston isDistinguished. Learn about Age-Related Macular Degeneration (ARMD).
- Geographic AtrophyDr. Johnston isDistinguished. Learn about Geographic Atrophy.
- Late-Onset Retinal DegenerationDr. Johnston isDistinguished. Learn about Late-Onset Retinal Degeneration.
- Advanced
- Diabetic RetinopathyDr. Johnston isAdvanced. Learn about Diabetic Retinopathy.
- EndophthalmitisDr. Johnston isAdvanced. Learn about Endophthalmitis.
- Retinal Artery OcclusionDr. Johnston isAdvanced. Learn about Retinal Artery Occlusion.
- Retinal DetachmentDr. Johnston isAdvanced. Learn about Retinal Detachment.
- Retinal Vein OcclusionDr. Johnston isAdvanced. Learn about Retinal Vein Occlusion.
- Experienced
- Bietti Crystalline Dystrophy (BCD)Dr. Johnston isExperienced. Learn about Bietti Crystalline Dystrophy (BCD).
- CataractDr. Johnston isExperienced. Learn about Cataract.
- NeuroretinitisDr. Johnston isExperienced. Learn about Neuroretinitis.
- Punctate Inner ChoroidopathyDr. Johnston isExperienced. Learn about Punctate Inner Choroidopathy.
- Subconjunctival HemorrhageDr. Johnston isExperienced. Learn about Subconjunctival Hemorrhage.
- UveitisDr. Johnston isExperienced. Learn about Uveitis.
View All 8 Experienced Conditions
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