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


The Different Types of Amblyopia: Understanding the Causes of “Lazy Eye”
Amblyopia is more than just a “lazy eye.” Learn the different types of amblyopia—including refractive, anisometropic, strabismic, deprivation, meridional, bilateral, and mixed amblyopia—and how each affects a child’s developing vision.

David B. Sabin
21 hours ago10 min read


Photochromic Lenses: Are Transition Lenses Worth It?
Photochromic lenses are a convenient lens upgrade that automatically darkens outdoors and clears indoors. They offer UV protection and comfort, but they may not fully replace polarized sunglasses, especially for driving.

David B. Sabin
5 days ago4 min read


MiSight 1 Day for Myopia Control: A First-Patient Clinical Guide for Optometrists
MiSight 1 day is an FDA-approved soft contact lens designed to both correct childhood myopia and slow its progression. This clinical guide walks optometrists through patient selection, baseline testing, lens fitting, axial-length monitoring, follow-up intervals, troubleshooting, and treatment-response decisions—from the first consultation through long-term management.

David B. Sabin
6 days ago14 min read


Clinical Myopia Control for Optometrists: Axial Length, MiSight, Atropine, Ortho-K, Treatment Failure, and Combination Therapy
Modern myopia management requires more than monitoring a child’s spectacle prescription. This clinician-focused guide reviews how optometrists can interpret axial elongation, establish treatment targets, fit MiSight contact lenses, select low-dose atropine concentrations, evaluate orthokeratology topography, identify inadequate treatment response, consider combination therapy, and establish appropriate follow-up intervals.

David B. Sabin
7 days ago16 min read


Myopia Control in Children: How We Can Slow the Progression of Nearsightedness
Myopia, or nearsightedness, often becomes stronger as children grow. Modern myopia-control treatments are designed not only to help children see clearly today, but also to slow the eye growth that causes their prescription to worsen over time.

David B. Sabin
Sep 78 min read


RGP Contact Lens Fitting: A Practical Guide When You Only Have a Keratometer
RGP lenses can provide sharp, stable vision for patients with astigmatism, keratoconus, and irregular corneas. Learn how eye doctors evaluate lens movement, fluorescein patterns, comfort, and corneal health during an RGP fitting.

David B. Sabin
Sep 39 min read


FSA and HSA: How to Use Your Benefits for Eye Care
Have FSA or HSA funds available? Learn how you may be able to use them for eye exams, prescription glasses, contact lenses, prescription sunglasses, and medical eye care.

David B. Sabin
Sep 24 min read


Ehlers-Danlos Syndrome and Your Eyes: What Patients Should Know
Ehlers-Danlos syndrome affects connective tissue throughout the body, including parts of the eye. Here’s what patients should know about vision changes, dry eye, corneal problems, and warning signs.

David B. Sabin
Sep 14 min read


Guillain-Barré Syndrome and the Eyes: Why Vision Changes Can Happen
Guillain-Barré syndrome is a rare nerve condition that can affect more than the arms and legs. In some patients, it can cause double vision, droopy eyelids, trouble moving the eyes, and dry eye from poor blinking. Here’s what patients should know about the eye-related warning signs.

David B. Sabin
Aug 314 min read


Blog 2: Doctor-Focused Clinical Version: Pituitary Tumors: A Clinical Guide for Eye Doctors
Pituitary tumors are common and usually benign, but macroadenomas can compress the optic chiasm and cause bitemporal visual field loss. This clinical guide reviews eye findings, testing, referral signs, and management considerations

David B. Sabin
Aug 284 min read


Blog 1: Patient-Friendly Version: Pituitary Tumors and Your Eyes: What Patients Should Know
Pituitary tumors are usually benign, but they can affect side vision when they press on the optic nerves. Learn the symptoms, how common they are, and why an eye exam can help detect early warning signs.

David B. Sabin
Aug 273 min read


Patient Friendly Version: Altitudinal Visual Field Defects: Why the Pattern Matters
An altitudinal visual field defect means the top or bottom part of vision is missing. This pattern often respects the horizontal midline and may point toward disease in the eye, retina, or optic nerve. Brain-related visual field defects more often respect the vertical midline, making the pattern of vision loss an important diagnostic clue.

David B. Sabin
Aug 264 min read


Clinical Guide for Eye Doctors: Horizontal vs Vertical Meridian Visual Field Defects
Altitudinal visual field defects often respect the horizontal meridian and commonly localize to the retina, retinal nerve fiber layer, or optic nerve. In contrast, chiasmal and retrochiasmal lesions often respect the vertical meridian. This clinical guide reviews localization, differential diagnosis, artifacts, and urgent red flags for doctors interpreting visual fields.

David B. Sabin
Aug 258 min read


What Is Amblyopia and Why Early Treatment Matters
Amblyopia, often called lazy eye, happens when the brain does not fully learn to use one eye clearly during childhood. Early treatment with glasses, patching, drops, or binocular vision therapy can make a major difference in long-term vision.

David B. Sabin
Aug 244 min read


Why Your Eyes Water When They Are Actually Dry
If your eyes water all day but still feel dry, you may have tear film instability or meibomian gland dysfunction. Learn why dry eye can trigger reflex tearing and how treatment can help restore comfort.

David B. Sabin
Aug 216 min read


What Is a Cover Test? How Eye Doctors Check for Eso, Exo, Hyper, Tropias, and Phorias
A cover test is a simple but powerful eye alignment test that helps detect hidden or visible eye turns. Learn what eso, exo, hyper, tropia, and phoria mean during an eye exam.

David B. Sabin
Aug 208 min read


Horner’s Syndrome vs. Congenital Horner’s Syndrome: What Eye Doctors Look For
Horner’s syndrome can cause a smaller pupil, mild droopy eyelid, and sometimes a lighter-colored iris when present from birth. Learn how optometrists compare acquired Horner’s syndrome with congenital Horner’s syndrome, what red flags require urgent evaluation, and why pediatric cases need careful monitoring for vision development.

David B. Sabin
Aug 196 min read


Optometrist Guide to Adie’s Tonic Pupil: Diagnosis, Symptoms, and Treatment With Glasses and Contacts
Adie’s tonic pupil is a condition where one pupil becomes larger and reacts slowly to light, often causing glare, light sensitivity, and near focusing problems. This guide explains how optometrists diagnose Adie’s pupil, rule out more serious causes of anisocoria, and manage symptoms with reading glasses, bifocals, tinted lenses, polarized sunglasses, and specialty contact lenses.

David B. Sabin
Aug 1810 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


The History of Progressive Lenses: How No-Line Bifocals Changed the Way We See
Progressive lenses may look like regular glasses, but inside the lens is a carefully designed blend of prescriptions that helps your eyes see clearly at far, intermediate, and near distances.

David B. Sabin
Aug 146 min read
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813-843-2653
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