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


A Patient-Friendly Guide to Pupils: What Your Eye Doctor Is Checking
Your pupils can tell your eye doctor a lot about your eye health, nerve function, and how your eyes respond to light. Learn what is normal, what may need attention, and when to schedule an eye exam.
David B. Sabin
Jun 276 min read


Blue Light Glasses: Do They Really Help?
Blue light glasses may make screens feel more comfortable for some people, but research shows they are not a cure for digital eye strain. Here’s what patients should know.
David B. Sabin
Jun 255 min read


Clinical Guide to Color Vision Deficiency: Types, Testing, Medications, and Neurologic Causes
Color vision deficiency is not always simple “color blindness.” Learn how clinicians test color vision, distinguish congenital from acquired defects, and recognize medication, retinal, optic nerve, and neurologic causes of color vision changes.
David B. Sabin
Jun 1812 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


What an Optometrist Needs to Know When a Patient With a Recent Concussion Presents for an Eye Exam
Concussion patients may see 20/20 but still struggle with focusing, eye teaming, reading, light sensitivity, and dizziness. Here is what optometrists should know and do during a post-concussion eye exam.
David B. Sabin
May 317 min read


Advanced Clinical Test | Parks-Bielschowsky Three-Step Test: How To Use It
The Parks 3-step test helps eye doctors evaluate vertical double vision by narrowing down which eye muscle may be causing the misalignment. This clinician-focused guide explains how to use the test, interpret hypertropia patterns, and recognize when findings may point to a superior oblique palsy or another cause of diplopia.
David B. Sabin
May 223 min read


Clinical Guide for Doctors: Diplopia Evaluation, Cranial Nerve Palsies, and Diabetes
Diplopia requires a systematic clinical approach. This doctor-focused guide reviews how to separate monocular from binocular double vision, localize cranial nerve and eye muscle patterns, recognize urgent red flags, and understand how diabetes can contribute to microvascular ischemic cranial nerve palsies.
David B. Sabin
May 216 min read


Patient Friendly Guide to Double Vision: Causes, Symptoms, and When to Get Your Eyes Checked
Double vision, or diplopia, can happen for many reasons—from dry eye and prescription changes to eye muscle or nerve problems. Learn when double vision should be checked and when it may be an
David B. Sabin
May 205 min read


Hypochlorous Acid Spray in Eye Care: A Simple Step for Cleaner, Healthier Eyelids
Hypochlorous acid spray is a gentle eyelid hygiene option used in eye care to help reduce bacteria, calm irritation, and support patients with blepharitis, dry eye, styes, and contact lens-related eyelid buildup.
David B. Sabin
May 195 min read


Computer Vision Syndrome: Why Screens Make Your Eyes Tired
Do your eyes feel tired, dry, or blurry after long hours on a computer or phone? Learn why screens cause digital eye strain and what you can do to make your eyes more comfortable.
David B. Sabin
May 184 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


Optos Undilated Retinal Imaging: A Clearer Look at Your Eye Health Without Dilation
Optos retinal imaging allows your eye doctor to capture detailed wide-field images of the retina, often without dilation. Learn how undilated retinal images help detect eye disease, monitor changes over time, and support a more comfortable eye exam at OPT-ISM in Tampa.
David B. Sabin
May 85 min read
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3825 Henderson Blvd, Suite 103, Tampa, FL 33629
813-843-2653
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