Home » Newsletters » May 30, 2012 – Aniseikonia is more prevalent than we think
SHAW™ lens makes spectacle lenses with a simple and
binocular lens design. We can do better for our patients
– and that’s the driving force behind the SHAW lens.
Aniseikonia – How
many patients are
Nobody likes Aniseikonia. ODs don’t like to talk about it. Patients only know it as they have to “get used to” the way they see through their glasses. It’s difficult to describe. And difficult to diagnose. And there really hasn’t been anything that we can do about it.
Patients can’t report that their problem is “image size disparity and trouble fusing.” How would they recognize that? They just know that their glasses aren’t what they want them to be – comfortable. But they get headaches, eyestrain, light-sensitivity, difficulty reading, even nausea and fatigue, which they may or may not attribute to their glasses at all.
Clinical trials and research indicate that aniseikonia induced by glasses is the principal cause of patient discomfort with eyeglasses. But how many patients are experiencing this discomfort?
There are no norms for tolerance of aniseikonia. But all glasses can create aniseikonia, because all glasses create prismatic effect by virtue of looking through a lens.
So how many patients are affected? How many times, as an OD, have you had to tell a patient that they will “get used to” their new glasses? How many patients come back with complaints about their glasses? How many patients do we label as “difficult” or “non-adapts”?
Aniseikonia is more prevalent than we think. And now there is a solution, with the new patent-pending SHAW lens. Isn’t it worth working with patients to provide for them the most comfortable lenses possible. The SHAW lens.
We stand behind the
comfort of our lenses
The SHAW lens guarantee; Our promise to the patient is that if they don’t think their SHAW lenses are the best they’ve worn from the minute they put them on – then someone’s made a mistake. We offer a 90-day adaptation/doctors change warranty that is a full credit. Call us and we’ll make it right.
Case: Anisometropia – Low myopia
This patient presented with discomfort from her habitual spectacles, stating that she only felt comfortable while looking through the centers of her lenses. This case clearly demonstrates that even a mild degree of anisometropia can be problematic. This is easily and accurately predicted through standard motor fusion testing by the optometrist, assisted by the SHAW lens design tool. The resultant SHAW lens satisfies the motor fusion requirements.
The image above shows the difference between a conventional 1.6 lens and the SHAW lens. The darker blue indicates the binocular field of view. Note how the reading zone is included in the binocular field of view with the SHAW lens.
Motor Fusion Limits @ 6m
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Do you have a case you’d like to share with Shaw Lens Inc.?