Treatment

Fsyx

Also known as Ocular Pressure Adjusting Pump, FSYX OPAP, Negative Pressure Goggles, Glaucoma Pressure Goggles, Overnight Eye Pressure Device

Updated May 16, 2026For educational purposes only. Not a substitute for medical advice. See our terms.

Bottom Line

Fsyx is a prescription glaucoma device worn during sleep. It uses gentle negative pressure around the eyes to lower eye pressure while it is being worn.

Fsyx is an FDA-cleared prescription device for adults with open-angle glaucoma. It uses goggles and a pump to apply negative pressure around the eyes during sleep 1.

Negative pressure lowers the outside pressure pushing on the eye. Studies of multi-pressure dial devices found eye pressure lowering during negative pressure use 2.

Fsyx does not replace glaucoma monitoring. Your doctor still tracks optic nerve health, side vision, eye pressure, comfort, and device use.

How It Works

Fsyx goggles seal around the eyes during sleep. A small pump creates negative pressure inside the goggle space.

The FDA decision summary describes the device as lowering eye pressure only while negative pressure is properly applied 1.

Studies of negative pressure devices found eye pressure lowering during active use 2.

Who May Not Be a Fit

Fsyx may not fit every glaucoma patient.

  • People who cannot sleep with sealed goggles.
  • People with eye surface or eyelid problems that prevent a safe seal.
  • People who need emergency glaucoma surgery or very low pressure right away.
  • People who cannot attend follow-up checks.

Your glaucoma specialist decides whether the device matches your eye anatomy and pressure goal.

Cost and Insurance

Fsyx is a prescription device, so coverage may depend on diagnosis, prior treatment, and insurer policy.

  • Ask whether the device is billed as durable medical equipment.
  • Ask what supplies or monitoring fees are separate.
  • Ask whether prior authorization is needed.
  • Keep using other glaucoma treatment unless your doctor changes it.

Common Questions About Fsyx

No. It lowers eye pressure while used. It does not repair optic nerve damage.

Next Steps

  1. 1Ask your glaucoma specialist whether your diagnosis is open-angle glaucoma.
  2. 2Review your target eye pressure and whether current treatment is enough.
  3. 3Ask how the device seal, settings, and usage will be checked.
  4. 4Keep taking prescribed glaucoma drops unless your doctor changes them.
  5. 5Report eye pain, redness, swelling, or poor goggle fit.

Find specialists for Fsyx

Board-certified ophthalmologists who treat Fsyx.

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