Low vision · Devices
Low Vision Aids Guide matching the device to the task.
Low vision devices work when they are chosen for a specific task, at a specific distance, with the right lighting. This guide sorts the main device families described by the American Optometric Association and shows how a practice can fit them into a low vision evaluation.
Quick answer
Start with the task, then the magnification.
Ask what the patient most wants to do again: read mail, see a phone, watch television, recognize faces or cook safely. Then trial the device family that fits that distance. Optical magnifiers and telescopes cover many near and distance tasks, electronic magnifiers add contrast control, and filters and lighting often help every other device work better.
Key takeaways
- The AOA grades moderate low vision as 20/70 to 20/160 in the better eye with best correction.
- Legal blindness is 20/200 or worse in the better eye, or a field of 20 degrees or less.
- Bioptic telescopes can be used for driving in most states, per the AOA.
- Electronic magnifiers allow variable magnification, brightness and contrast reversal.
- Medicare excludes eyeglasses and refraction, so discuss device costs up front.
Six device families.
Each solves a different distance or task. Most patients end up with more than one.
Spectacle microscopes
High-plus reading lenses mounted in glasses or on a headband, leaving both hands free for close work.
Handheld and stand magnifiers
Optical magnifiers, with or without built-in lights, for quick tasks like labels, price tags and dials.
Telescopes
Handheld or spectacle-mounted telescopes for distance viewing, and bioptic designs for driving where states allow it.
Electronic magnifiers
Portable, desktop and head-mounted video systems with adjustable magnification, brightness and contrast.
Filters and lighting
Glare-control filters and task lighting improve comfort and contrast for many low vision patients.
Implantable telescope
Samsara Vision describes its Implantable Miniature Telescope as the first and only FDA-approved implantable device for qualified late-stage AMD.
Task to device, at a glance.
A starting point for the trial, based on AOA device descriptions.
| Patient goal | Device families to trial | Pair it with |
|---|---|---|
| Read mail and books | Spectacle microscope, stand magnifier, electronic magnifier | Task lighting |
| Read medicine labels | Illuminated handheld magnifier | High-contrast labeling |
| Watch television | Spectacle-mounted or handheld telescope | Seating closer to the screen |
| Use a phone or computer | Built-in accessibility settings, electronic magnification | Glare-control filter |
| Drive, where legal | Bioptic telescope with state licensing requirements | Training program |
Trial devices in the exam room with the patient's own materials: a pill bottle, a bill, their phone. A device that works on a reading card but not on the patient's real task tends to end up in a drawer.
Frequently asked questions
Who is a candidate for low vision devices?
Anyone whose vision limits daily activities after the best standard correction. The NEI notes that low vision cannot be fixed with glasses, contacts, medicine or surgery alone.
Does Medicare pay for low vision devices?
Medicare excludes eyeglasses and refraction in its routine services rules. Check each plan, and be clear about device costs before ordering.
What magnification should I start with?
It depends on the acuity, the task distance and the device type. Start from the patient's goal and adjust during the trial.
Can low vision patients drive with a telescope?
The AOA notes that bioptic telescopes can be used for driving in most states. Each state sets its own vision and training requirements.
Are electronic magnifiers better than optical ones?
Not always. Electronic devices add contrast control and larger fields, while optical devices are smaller and simpler. Many patients use both.
Does Vision Rescue sell these devices?
Not at this time. Device makers and low vision distributors supply them; this guide is for planning the service.
References
- American Optometric Association. Low vision and vision rehabilitation. AOA
- National Eye Institute. Low vision. NEI
- Samsara Vision. Implantable Miniature Telescope. Samsara Vision
- Centers for Medicare & Medicaid Services. Medicare Benefit Policy Manual, Chapter 16, section 90. CMS PDF
- Every source used across these guides is listed on the Vision Rescue sources page.
About this guide
Written for licensed eye care practices by the Vision Rescue team. Questions: providers@visionrescue.com or 1-855-692-8024.
Important notes and disclosures
Information only, not clinical or legal advice. Product names are trademarks of their owners and appear for identification; Vision Rescue does not endorse or review them. Scope of practice, coverage and coding rules vary by state and payer, so confirm locally. Clinical decisions rest with the treating eye doctor.
Fit the device to the life.
Pair a structured device trial with rehabilitation referrals, and keep the medical eye care in your practice.