Samsung Repurposing Old Galaxy Phones for Eye Care

Samsung has begun repurposing older Galaxy smartphones as dedicated eye care tools, primarily through its “Eye Care” feature that uses the phone’s front camera to screen for common vision problems. You enter basic details like age and whether you wear glasses, then follow on-screen prompts to test for conditions such as myopia, hyperopia, astigmatism, and color blindness. The phone returns a preliminary assessment and recommends whether you should see an eye care professional.

Background: Why Old Phones for Eye Care?

The idea builds on Samsung’s broader sustainability push, which includes the Galaxy Upcycling program. Instead of letting older devices sit in drawers or end up as e-waste, Samsung has explored giving them second lives as smart home sensors, baby monitors, and now vision screening tools. Eye care is a natural fit because the hardware needed—a high-resolution front camera, a screen, and a processor—already exists in every Galaxy phone. The software does the heavy lifting, so no new components are required.

Samsung first introduced the Eye Care feature in 2021 for select Galaxy models, starting with the Galaxy S10 series and later expanding to the Galaxy Note 10 and Note 20 lines. The feature is available through the Samsung Members app, not as a separate download, and it works entirely offline—no data leaves the phone. That privacy angle matters, since vision screening involves personal health information.

How the Eye Care Feature Works

The screening uses a series of interactive tests, each designed to assess a different aspect of vision:

• Myopia (nearsightedness): You see a blurry image and adjust a slider until it looks sharp. The phone calculates your approximate spherical equivalent.
• Hyperopia (farsightedness): Similar to the myopia test but with a different focusing target.
• Astigmatism: Lines at various angles are shown; you indicate which set appears clearest.
• Color blindness: You identify numbers or shapes within Ishihara-style plates.

Each test takes about 30 seconds. The phone uses the front camera to measure the distance between your eyes and the screen, ensuring the test is performed at a consistent viewing distance. It also checks ambient lighting and tells you to adjust if the room is too bright or too dark. At the end, you get a simple result: “Normal” or “Suggests further examination.”

The underlying math is straightforward. For myopia, the phone estimates the refractive error based on the lens position you chose for sharp focus, then converts that to a diopter value using a calibration factor. For astigmatism, it compares your responses across different line orientations to estimate the cylinder axis. These are screening estimates, not clinical measurements—they have a typical error margin of about ±0.5 diopters.

Which Galaxy Phones Are Eligible?

Samsung has not released an official compatibility list, but the feature has been confirmed to work on the following models:

• Galaxy S10 series (S10, S10+, S10e)
• Galaxy Note 10 series (Note 10, Note 10+)
• Galaxy Note 20 series (Note 20, Note 20 Ultra)

Newer phones like the Galaxy S21 and later also have the feature, but the repurposing angle targets older devices. If you have a Galaxy phone from 2019 or 2020, check the Samsung Members app under the “Support” tab—you’ll see an “Eye Care” entry if your model is supported. The feature is not available on budget A-series or M-series phones, likely because they lack the precise front camera autofocus needed for distance measurement.

How to Set Up a Repurposed Phone

To turn an old Galaxy phone into a dedicated eye care tool, follow these steps:

1. Factory reset the phone and update it to the latest Android version supported for that model.
2. Install the Samsung Members app from the Galaxy Store or Google Play.
3. Open Samsung Members, go to the Support tab, and tap “Eye Care.”
4. Enter your age, gender, and whether you currently wear glasses or contacts.
5. Follow the prompts to complete each test in a well-lit room.
6. After the screening, the app stores your results locally. You can repeat the test anytime.

For a dedicated setup, you can disable all other notifications and apps, and even put the phone in “Maintenance mode” if available. This turns the device into a single-purpose tool, which also extends its useful life.

Accuracy and Limitations

The Eye Care feature is explicitly a screening tool, not a diagnostic device. It cannot detect conditions like glaucoma, cataracts, or retinal detachment—those require specialized equipment. It also cannot measure intraocular pressure or examine the back of the eye. The screening is designed to catch common refractive errors and color vision deficiencies that might otherwise go unnoticed.

Studies on smartphone-based vision screening have shown reasonable sensitivity for myopia detection, but they are not a substitute for a comprehensive eye exam. The American Academy of Ophthalmology recommends that adults get a baseline eye exam at age 40, and then every 1-2 years depending on risk factors. The Eye Care feature can help you decide whether to schedule that exam sooner, but it cannot tell you your exact prescription.

A common misconception is that the feature can replace glasses. It cannot. It only tells you whether you might need correction, not what the correction should be. If the screening suggests a problem, you still need an optometrist or ophthalmologist to perform a refraction test and write a prescription.

Privacy and Data Safety

Because the feature runs entirely on-device, your vision data never leaves the phone. Samsung states that no personal health information is transmitted to its servers. The results are stored locally in the Samsung Members app and can be deleted at any time by clearing the app’s data. This makes the repurposed phone a privacy-friendly option compared to cloud-based vision apps that upload your data for analysis.

That said, if you later connect the phone to a Samsung account and enable cloud backup, app data—including Eye Care results—may be included in the backup. To keep the data strictly local, disable cloud backup for Samsung Members in the phone’s settings.

Alternatives and Comparisons

Samsung’s Eye Care is not the only smartphone-based vision screening option. Several independent apps, such as Peek Acuity, EyeQue, and Visibly, offer similar tests. The key differences:

• Peek Acuity is a clinical-grade visual acuity test used in field studies, but it requires a physical eye chart and a second person to administer.
• EyeQue sells a clip-on lens attachment that turns your phone into a manual refractometer—more accurate than Samsung’s screen-based test, but it costs extra.
• Visibly offers an online eye exam with a remote optometrist, but it requires a prescription and is not a screening tool.

Samsung’s advantage is that it’s free, built-in, and requires no extra hardware. The trade-off is lower accuracy and a narrower scope—it only checks for the most common refractive errors and color blindness.

Cost and Environmental Impact

Repurposing an old Galaxy phone for eye care costs nothing beyond the device you already own. There are no in-app purchases or subscription fees. From an environmental standpoint, extending a phone’s life by even one year reduces its carbon footprint by roughly 30-40%, according to lifecycle analyses of consumer electronics. Using an old phone as a medical screening device is a particularly high-value reuse because it displaces a dedicated device that would otherwise need to be manufactured.

Frequently Asked Questions

Can I use this feature on a Galaxy phone that’s not on the official list?
Probably not. The feature relies on specific camera hardware to measure viewing distance. If your model isn’t listed, the Samsung Members app won’t show the Eye Care option. You can try sideloading the APK, but it likely won’t work correctly without the supported sensor.

Is the Eye Care screening accurate enough to skip a doctor’s visit?
No. It’s a screening tool, not a diagnostic one. If it indicates a problem, you should see an eye care professional. If it says “normal,” you should still follow the recommended exam schedule for your age and risk factors.

Does the feature work for children?
Yes, but the app asks for age and adjusts the test difficulty accordingly. For children under 6, the tests may be too complex, and a pediatric eye exam is recommended instead.

Can I use the phone as an eye care tool without a SIM card or internet connection?
Yes. The feature works entirely offline. You only need to power on the phone and open the Samsung Members app. No SIM or Wi-Fi is required.

Will Samsung continue supporting the Eye Care feature on older phones?
Samsung has not announced a discontinuation date. However, as older models stop receiving major Android updates, the Samsung Members app may eventually drop support. You can still use the phone with the last working version of the app.

Does the feature store my results permanently?
Results are stored locally until you delete them. You can clear the app’s data to remove all history. There is no cloud sync unless you explicitly enable backup for Samsung Members.

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