In both ophthalmology and neurology, the optokinetic drum (OKN drum) is a time-honored tool for evaluating optokinetic nystagmus, a reflexive eye movement triggered by motion across the visual field. Traditionally, this drum is a cylindrical device painted with alternating stripes. As it slowly rotates, clinicians watch for the characteristic back-and-forth eye movements. A positive response suggests that the patient has at least some degree of visual function, making the OKN drum particularly useful when assessing patients who may be malingering or claiming no light perception.
But like many legacy medical tools, the traditional OKN drum has its limitations. It's bulky, inconvenient to transport, and not always accessible on call. That's where My Call Bag's digital OKN drum offers a smart, modern alternative.
Why a Digital OKN Drum?
The OKN Drum in My Call Bag brings the familiar functionality into a compact, intuitive format that lives on your iPhone. It is always accessible when you need it most.
Here's why it stands out:
1. Precise Speed Control
While traditional drums rely on manual rotation, My Call Bag lets you fine-tune the speed with on-screen controls, enhancing testing accuracy and reproducibility.
2. Customizable Stripe Size
Adjust the width of the stripes to increase visual stimulation and more effectively capture attention in patients with limited cooperation or visual focus.
3. Pediatric-Friendly with Custom Imagery
Kids not responding to black-and-white stripes? Switch to fun, engaging visuals like cartoon faces or even a selfie of the patient. It turns a clinical test into an interactive one and often enhances cooperation.
What's more, My Call Bag uses the iPhone's built-in gyroscope and accelerometer to ensure that pediatric figures always remain in the correct orientation, regardless of how you hold or move the device. This intelligent orientation correction means the images stay upright and recognizable, maintaining the child's engagement and ensuring a more reliable test response.
4. Effortless Documentation
Use the device's front-facing camera to record the session. Whether you're documenting proof of nystagmus for medicolegal purposes or tracking visual function over time, recording right from the app makes the process seamless.
5. On-the-Go Convenience
No need to carry around an expensive cylindrical drum. The My Call Bag OKN tool lives in your pocket, ready for action anywhere from the clinic to the emergency room to on-call rounds.
A New Standard for Vision Testing Tools
The OKN Drum in My Call Bag is more than a digital replica. It is an improved, intelligent version of a tool that has been relied on for decades. As vision care moves further into digital transformation, tools like this give clinicians the flexibility, precision, and documentation that today's workflow demands.
Ready to see it in action? Explore the OKN Drum and more in My Call Bag, now available on the App Store.
Try the future of vision testing
My Call Bag makes it simple and accurate, right from your iPhone.