Field Expanding Glasses in Palm Harbor, FL
Field Expanding Glasses use high-powered prisms placed in the peripheral vision to expand a hemianopic patient’s awareness of their blind side. With the Peli Lens™, patients can improve awareness on their blind side by over 30 degrees.
Request an AppointmentHow Field Expanding Glasses Work
Hemianopia is the loss of vision in half of the visual field in one or both eyes, often caused by stroke, brain injury, or certain neurological conditions. This kind of vision loss can make it difficult to notice people, objects, or obstacles approaching from the affected side, which impacts both safety and confidence when moving through everyday environments.
Field Expanding Glasses address this by placing high-powered prisms in the peripheral portion of the lens, outside your normal line of sight. These prisms shift images from your blind side into your seeing field of vision, effectively expanding your overall awareness without requiring you to change how you look at the world. With the Peli Lens™, one of the most advanced field expanding designs available, many patients experience an improvement of more than 30 degrees on their blind side.
Watch the video above to see how the Peli Lens™ can improve mobility and awareness for patients with hemianopia.
Who Can Benefit from Field Expanding Glasses?
Field Expanding Glasses are specifically designed for patients with hemianopia or other significant peripheral field loss. They’re often used alongside broader low vision rehabilitation therapy to help patients build confidence navigating stairs, sidewalks, and busy environments safely.
If your vision loss also affects near or distance clarity, Field Expanding Glasses can be paired with other devices, such as bioptic glasses for distance viewing or Clear Image Microscopic Glasses for reading. You can compare our complete range of options on the Low Vision Glasses page, including E-Scoop Glasses and FDTS Glasses.
Whether Field Expanding Glasses are right for you depends on the specific nature and extent of your visual field loss, which we assess during a comprehensive low vision evaluation. Learn more about the eye and neurological conditions that can cause this kind of vision loss on our Low Vision Diseases page, or explore our full scope of low vision treatments. If you’re new to our practice, our New Patient Center outlines what to expect at your first visit.
Field Expanding Glasses: Frequently Asked Questions
What are Field Expanding Glasses?
Field Expanding Glasses use high-powered prisms placed in the peripheral portion of the lens to expand a patient’s awareness of their blind side, most often for patients with hemianopia.
What is the Peli Lens™?
The Peli Lens™ is an advanced field expanding lens design that can improve a patient’s awareness on their blind side by over 30 degrees.
Who benefits from Field Expanding Glasses?
Patients with hemianopia, or loss of vision in half of their visual field due to stroke, brain injury, or a neurological condition, typically benefit most from Field Expanding Glasses.
Do Field Expanding Glasses replace my regular glasses?
Not necessarily. Field Expanding Glasses are often paired with other low vision devices, such as bioptic glasses or magnifying glasses, depending on your full range of vision needs.
How do I know if Field Expanding Glasses can help me?
A comprehensive low vision evaluation will assess the extent of your visual field loss to determine whether Field Expanding Glasses are the right solution for you.
