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OPT-ISM Eye Care Blog
Helpful eye care tips, vision education, and modern optometry insights from OPTISM in Tampa, FL.


Pachymetry: Why Corneal Thickness Matters in Glaucoma and Eye Care
Pachymetry is a quick, painless test that measures corneal thickness. It plays an important role in glaucoma risk assessment and eye-pressure interpretation, while also helping evaluate keratoconus, corneal swelling, and refractive surgery candidates.

David B. Sabin
Sep 243 min read


Retinitis Pigmentosa: An Optometrist’s Guide to OCT, FAF, ERG, Visual Fields, Genetics, and Referral
Retinitis pigmentosa is a genetically diverse group of rod-cone dystrophies that requires more than recognition of classic bone-spicule pigmentation. This clinical guide reviews OCT, fundus autofluorescence, visual fields, ERG, genetic testing, treatable complications, referral considerations, and practical follow-up for optometrists.

David B. Sabin
Sep 2111 min read


Retinitis Pigmentosa: Symptoms, Causes, Diagnosis, and Treatment
Retinitis pigmentosa is a group of inherited retinal diseases that can gradually affect night vision, peripheral vision, and eventually central vision. Learn the common symptoms, how RP is diagnosed, available treatments, and why genetic testing and regular eye exams are important.

David B. Sabin
Sep 158 min read


What Is an Eye Freckle? Choroidal Nevus vs. Conjunctival Nevus vs. Iris Nevus
Eye freckles are usually harmless pigmented spots, but they should be monitored. Learn the difference between choroidal, conjunctival, and iris nevi, how doctors photograph them, and which warning signs need attention.

David B. Sabin
Aug 176 min read


Macular Degeneration: Early Signs and Eye Exam Testing
Macular degeneration can cause blurry central vision, wavy lines, and difficulty reading. Learn how retinal imaging and OCT testing help detect and monitor macular changes early.

David B. Sabin
Jul 165 min read


Part 6 | How to Read an OCT RNFL: Understanding Optic Nerve and Glaucoma Testing
Learn how OCT RNFL scans help evaluate the optic nerve and glaucoma risk by measuring retinal nerve fiber layer thickness, quadrants, clock hours, TSNIT curves, and progression.

David B. Sabin
Jun 176 min read


Part 5 | How to Read an HVF 24-2 Visual Field: A Practical Guide for Glaucoma Testing
Learn how eye doctors read an HVF 24-2 visual field, including reliability, grayscale, total deviation, pattern deviation, MD, PSD, VFI, and common glaucoma patterns.

David B. Sabin
Jun 166 min read


Part 3 | Glaucoma Treatment Options: Eye Drops, Laser Procedures, and Surgery
Glaucoma treatment may include prescription eye drops, laser procedures, or surgery. Learn how different glaucoma drops work and when laser or surgical options may be recommended.

David B. Sabin
Jun 127 min read


Part 2 | Different Types of Glaucoma: What Patients Should Know
Glaucoma is not just one condition. Learn the main types of glaucoma, how they affect the optic nerve, and why regular eye exams are important for protecting vision.

David B. Sabin
Jun 114 min read


How OCT Helps Evaluate the Retina, Macula, Optic Nerve, Glaucoma, Diabetes, and Plaquenil Monitoring
OCT is a quick, painless imaging test that helps your eye doctor evaluate the retina, macula, optic nerve, glaucoma, diabetic eye disease, and Plaquenil-related retinal changes.

David B. Sabin
Jun 25 min read
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3825 Henderson Blvd, Suite 103, Tampa, FL 33629
813-843-2653
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