Neomycin and polymyxin B sulfates and bacitracin zinc ophthalmic ointment is mainly used to treat superficial bacterial infections of the eye and eyelids, such as conjunctivitis (“pink eye”), keratitis, and blepharitis, when caused by susceptible bacteria.

What this ointment is

This is a combination antibiotic eye ointment.
It contains three antibiotics (neomycin, polymyxin B, bacitracin) in a petrolatum base and is made specifically for use on the eye surface (ophthalmic use).

What it is used for

Common uses in humans include treatment of superficial infections of:

  • Conjunctiva (conjunctivitis, “pink eye”).
  • Cornea (keratitis, keratoconjunctivitis).
  • Eyelid margins (blepharitis, blepharoconjunctivitis).
  • Other mild superficial infections of the external eye and its adnexa (surrounding structures) caused by susceptible bacteria.

In veterinary medicine, similar formulations are used for superficial bacterial infections of the eyelid and conjunctiva in dogs and cats, again only when due to susceptible organisms.

How it works (in simple terms)

All three antibiotics target bacteria in different ways, giving broader coverage:

  • Neomycin: interferes with bacterial protein synthesis.
  • Polymyxin B: damages the bacterial cell membrane, especially in Gram‑negative bacteria.
  • Bacitracin: interferes with bacterial cell wall synthesis.

Together, they help clear the infection on the eye surface and eyelid.

Important cautions and limitations

  • It treats bacterial , not viral, fungal, or allergic eye conditions. Viral eye diseases like herpes simplex keratitis, vaccinia, and varicella are listed as situations where related combinations should not be used.
  • It should not be used if you know you are allergic to any component (especially neomycin, which can cause allergic reactions in some people).
  • Prolonged use may increase the risk of overgrowth of non‑susceptible organisms (including fungi) and sensitization. If symptoms worsen or don’t improve, medical review is needed.
  • The tube tip must not touch the eye, eyelid, fingers, or any surface to avoid contamination and re‑infection.

Typical context of use (not dosing advice)

Clinicians usually prescribe this ointment:

  • As short‑course therapy (often several times a day for a limited number of days).
  • When they suspect or confirm a superficial bacterial eye infection.
  • Sometimes after minor eye procedures to prevent infection, based on clinical judgment.

Exact dosing, duration, and whether it’s appropriate for you must be decided by a doctor or eye specialist.

Small “forum-style” perspective

If you’ve seen people talk about it online, they often describe it like:

“The doctor gave me a triple‑antibiotic eye ointment for my pink eye/eyelid infection. It’s thick and a bit blurry after you put it in, but it helps calm the redness and gunk.”

That matches its labeled use for superficial infections of the external eye and adnexa caused by susceptible bacteria.

When you should see a doctor urgently

Stop self‑treating and seek prompt in‑person care if:

  1. You have severe eye pain, sudden vision changes, or light sensitivity.
  2. There is swelling around the eye, fever, or feeling very unwell.
  3. Symptoms worsen or don’t improve within a few days on treatment.
  4. You suspect a foreign body, chemical splash, or eye trauma.

Mini SEO-style quick facts

  • Main purpose: Treatment of superficial bacterial infections of the external eye and eyelids (e.g., conjunctivitis, keratitis, blepharitis).
  • Not for: Viral, fungal, or purely allergic eye problems.
  • Form: Sterile ophthalmic ointment, usually in a small tube.
  • Users: Humans (and, in specific veterinary versions, dogs and cats) under guidance of a professional.

Bottom note:
Information gathered from public forums or data available on the internet and portrayed here.

If you tell me your exact situation (symptoms, who prescribed it, and for whom—adult, child, or pet), I can help you interpret why it was likely given, but that won’t replace your prescriber’s advice.