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


How We See: A Simple Guide to How the Eye Forms an Image
Seeing feels instant, but your eyes and brain work together in a precise step-by-step process. Here is a simple guide to how light becomes vision.
David B. Sabin
12 hours ago4 min read


Pseudotumor Cerebri Symptoms: How Eye Doctors Check and Monitor the Optic Nerve
Pseudotumor cerebri can feel like a brain pressure problem and may affect the optic nerves before vision loss is obvious. A comprehensive eye exam can help detect optic nerve swelling, visual field changes, and other warning signs that need medical attention.
David B. Sabin
Jun 294 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


GLP-1 Medications and NAION: What Patients Should Know About Sudden Vision Loss
GLP-1 medications can provide major health benefits, but recent studies have raised questions about a possible link with NAION, a rare optic nerve condition that can cause sudden vision loss. Here is what patients should know.
David B. Sabin
May 144 min read
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813-843-2653
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