We’re gonna be honest here – we had some trouble putting together this page. It’s not because we lack expertise. It’s not because there’s a dearth of material available. It’s because the Peli Lens is so simple but so effective that it’s really hard to convey enough information to help you and your patients succeed with the Peli Lens without going so far overboard that we lose you in minutia.

Hopefully we’ve struck a good balance here between way too much information and not enough to be useful. If you have questions, please contact us. We help doctors and patients alike with the Peli Lens every day and we’re eager to help you too.

An Overview of the Process

Helping your patient get the Peli Lens is straightforward and simple. We recommend following the process we’ve established over the past 2 decades for best results. 

  1. Determine Peli Lens is the Solution: if your patient suffers from stroke-related visual field loss, the Peli Lens will likely help them regain some lost vision
  2. Demonstrate the Peli Lens: Using our PEK (Peli Evaluation Kit), show your patients the Peli Lens in-office to demonstrate its benefits
  3. Fit Training Prisms: training prisms are cost-effective way for your patients to learn how to use peripheral prisms over a 4-to-6 week trial period
  4. Monitor At-Home Training: during the trial period, routine at-home training has been shown to increase the benefit a patient receives from training prisms
  5. Order the Full-Power Peli Lens: the full-power Peli Lens offers greater field expansion and is far more durable than training prisms. We offer a variety of configurations to meet your patient’s needs and lifestyle. (See below for more info on getting full-power prisms.)

*Our experience has been that deviating from this process results in poorer results for your patients. 🙁

Below, we’ve detailed each step and provided additional resources where relevant to make sure your patient gets the most visual field expansion possible with the Peli Lens. 

Click to enlarge

1. Determining if the Peli Lens is Right for Your Patient

When determining if the Peli Lens is right for your patient, consider the following two questions:

  • Does your patient have stroke-related visual field loss (like homonymous hemianopia or quadrantanopia)?
  • Have they or their caregivers noticed impaired mobility or ability to drive?

If you answered yes to both questions, then your patient will most likely benefit from peripheral prisms.

2. Demonstrating the Peli Lens

Demonstrating the Peli Lens is an important aspect of making sure it’s the right solution for your patients. We cover this in some detail to ensure that the process is as simple as possible while still offering your patient the best outcome.

The Drawbacks of Demonstrating Multiple Options

In an effort to serve patients and show them all of their options, doctors often present multiple potential hemianopia solutions during the same visit. We strongly recommend against this.

Many experienced low vision doctors have patient success rates in excess of 75%, which aligns with data from the original clinical trial. 

While there are numerous other types of legacy lenses intended to offer field expansion for homonymous hemianopia, we do not recommend presenting these options until you’ve established that the patient does not accept the Peli Lens after a 4-6 week trial.

Demonstrating the Peli Lens In-Office using the PEK

The best way to demonstrate the Peli Lens in your office is using our PEK (Peli Evaluation Kit). This allows you to easily test either eye using horizontal or oblique lenses in a compact, durable configuration.

It also allows you to perform visual field tests to determine whether a patient can meet driving requirements in your state with the permanent lens. 

Click here to learn more about the PEK.

3. Fitting Training Prisms

Without a good fit, like when prism is placed in central vision, your patient will find the peripheral prisms bothersome and ineffective. That’s why we’ve gone to great lengths to explain in detail how to properly fit training prisms in our latest resource, Your Guide to the Peli Lens

Correctly Fit

Incorrectly Fit

Your Guide to the Peli Lens

In this newly updated guide, we provide an overview of all aspects of the Peli Lens, including in-depth instructions for fitting training prisms. We also highlight best practices and common mistakes to avoid.

We recommend giving it a read-through before your first appointment with a patient who is eligible for the Peli Lens.

Click the button below to access the guide.

A Note on Training Prisms

Training prisms are exactly that – a tool to help patients ensure that peripheral prisms are right for them and a way to integrate the benefit into their everyday lives before investing in the full-power Peli Lens. Training prisms are meant to be used for a maximum of 4 to 6 weeks. Once the patient accepts the benefit of training prisms, they’re ready to move on to full-power prisms, which will offer roughly twice as much field expansion in a more durable, portable format.

Order Training Prisms

Click here to order training prisms. You’ll be redirected to Tech Optics International, our low vision branch.

For driving, select the oblique prisms options. For mobility, oblique and horizontal prisms both offer benefit.

4. Training Patients to Use the Peli Lens

For your patients to get the most use out of Peli Lens peripheral prisms, it’s important for them to practice processing overlapping images.

When patients first wear training prisms, it’s common for them to experience visual confusion as they try to distinguish what’s in their blind field and what is in their seeing field. Training is meant to minimize this confusion and help your patient use vision in a different way.

The good news is that training is highly effective at reducing visual confusion. A pilot study at Schepens Eye Research Institute showed patients to be 95% accurate in distinguishing confusing images after just six one-hour training sessions.

Click here to visit our resource center on training patients to use the Peli Lens. If you need any guidance with training, feel free to contact us.

5. Order the Full-Power Peli Lens

Once your patient has successfully completed a 4 to 6-week trial of the Peli Lens, we recommend moving to the best option for long-term use: full-power prisms.

Full-power prisms offer increased field expansion in a more durable, resilient, and effective form than temporary prisms.

While we can embed Peli Lens peripheral prisms into nearly any lens, we recommend our Single Lens Attached by Magnets (SLAM) device. 

SLAM: Single Lens Attached by Magnets

After decades of putting full-power Peli Lens prisms into every frame and lens imaginable, we developed a single lens solution that gives your patient the ease and convenience they need to use Peli Lens prisms on their terms.

Chadwick’s Peli Lens using SLAM technology solution affixes to your patient’s existing glasses via 2 or 3 small magnets embedded on the side of the lens.

The benefits of Chadwick’s SLAM solution include:

  • Staying Power: our SLAM solution stays on the lens despite heavy shaking 
  • Durability: Our SLAM solution is quite durable
  • Comfort: Our SLAM solution is the least weighty of available options

The drawbacks of Chadwick’s SLAM solution include:

  • Aesthetics: having 2 or 3 magnets embedded in the lens of your patient’s dress glasses may be less aesthetically appealing than a single magnet in each lens. We can rectify this by embedding magnets on both side of their glasses for a more symmetrical look.

Ready to Order?

When you’re ready to order full-power prisms for your patients, you can either contact us or use this link to access our Peli Lens order forms.

Links to Peli Resources

Here are some links to pages that contain more information about the Peli Lens, how it works, and its benefits for patients.

How the Peli Lens Works

An overview of the concept, the science behind the Peli Lens, and its real-world application.

The Peli Lens for Driving

Visit this page to learn more about the Peli Lens for driving and considerations to take into account.

The Peli Lens for Mobility

Learn more about using the Peli Lens for mobility so that your patients can better navigate their world.

Still have questions?

If you still have questions or need assistance, please contact us. Our team has significant experience helping doctors and patients with every step of the Peli Lens process and we’re eager to help you as well.