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
ConditionClose
- Distinguished
- CataractDr. Johnston isDistinguished. Learn about Cataract.
- Advanced
- Age-Related Macular Degeneration (ARMD)
- Dry Eye SyndromeDr. Johnston isAdvanced. Learn about Dry Eye Syndrome.
- GlaucomaDr. Johnston isAdvanced. Learn about Glaucoma.
- Interstitial KeratitisDr. Johnston isAdvanced. Learn about Interstitial Keratitis.
- Late-Onset Retinal DegenerationDr. Johnston isAdvanced. Learn about Late-Onset Retinal Degeneration.
- Ocular Hypertension (OHT)Dr. Johnston isAdvanced. Learn about Ocular Hypertension (OHT).
- Experienced
- Allergic ConjunctivitisDr. Johnston isExperienced. Learn about Allergic Conjunctivitis.
- Bell's PalsyDr. Johnston isExperienced. Learn about Bell's Palsy.
- Benign Essential BlepharospasmDr. Johnston isExperienced. Learn about Benign Essential Blepharospasm.
- BlepharitisDr. Johnston isExperienced. Learn about Blepharitis.
- Blocked Tear DuctDr. Johnston isExperienced. Learn about Blocked Tear Duct.
- ChalazionDr. Johnston isExperienced. Learn about Chalazion.
View All 21 Experienced Conditions
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