Postoperative warning symptoms after eye surgery

The meaning of a symptom after eye surgery depends on the operation, the time since it occurred and whether recovery is improving or deteriorating. Cataract surgery, retinal repair, glaucoma surgery, a corneal graft and an intravitreal injection have different expected appearances and risks. Ask the patient to describe the change rather than simply whether the eye is sore. The ability to read, recognise faces or navigate may provide a useful comparison when a formal acuity measurement is not yet available. A new decline after initial improvement deserves particular attention.

Some discomfort, a gritty sensation, watering, light sensitivity or temporary blur can occur after an uncomplicated procedure. These symptoms should match the specific discharge information and generally move in the expected direction. Severe or increasing pain, escalating redness, discharge, lid swelling or reduced vision requires reassessment. The absence of fever is not reassuring for an infection confined to the eye. A telephone discussion can establish urgency and arrange care, but cannot reliably distinguish a benign surface problem from endophthalmitis when the visual course is concerning.

Postoperative infection can follow surgery or an intravitreal injection and may cause pain, redness, photophobia and loss of sight. Urgent ophthalmic examination and, where indicated, intraocular sampling and antimicrobial treatment are needed. Do not start a routine conjunctivitis course and wait to see whether it helps. Sterile inflammation and medication irritation are alternatives, but increasing steroid drops without assessment may delay the correct diagnosis. Obtain the treatment record and actual bottles when possible, including any uncertainty about which drops the patient has used.

Pressure disturbance may produce ocular pain, headache, halos, blurred vision and nausea. The cause can include early postoperative changes, inflammation, gas effects or a steroid response. Following glaucoma surgery, low pressure or a wound leak can also cause visual disturbance and requires the operating team's assessment. A painful red eye associated with a filtering bleb can be an infection even long after the original operation. Corneal graft rejection may present with redness, photophobia, blur or discomfort and warrants emergency specialist review rather than a routine optician appointment.

New flashes, increasing floaters or a spreading shadow raises concern about a retinal tear or detachment. These may be painless. The precise urgency and intervention depend on the retinal findings, so absence of pain should not lead to reassurance. Some patients with an intraocular gas bubble see a moving boundary as it resorbs; that expected appearance should have been explained, but it must not be assumed to explain every new field defect. Ask whether the pattern is familiar or newly expanding and obtain urgent advice when uncertain.

Intraocular gas requires precautions beyond the eye clinic. Nitrous oxide diffuses into a gas bubble and can expand it, sharply increasing pressure and threatening retinal perfusion. It is present in some general anaesthetics and in Entonox or Equanox used for short-term analgesia in ambulances, emergency departments, dental settings and maternity care. Avoid it while gas remains, use an alternative and tell the relevant team about the eye operation. Gas may persist for weeks depending on the agent and procedure; a universal short waiting interval is unsafe.

Flying and substantial altitude exposure can also expand intraocular gas because ambient pressure falls. The surgeon's gas-specific restrictions and confirmation of resolution should guide return to these activities. Patients should carry their gas information or warning card and disclose it before any procedure or emergency treatment. Oxygen itself is not the contraindicated component of Entonox, so needed oxygen should not be withheld. Follow prescribed posturing and activity advice, but do not assume that posture makes nitrous oxide exposure safe.

An effective postoperative plan names the medicines, eye, frequency, taper where relevant and review arrangements. Check dexterity, vision in the fellow eye, support at home and the ability to obtain more drops. Patients on an uncomplicated cataract pathway may not have a routine hospital review, but they still need clear access for unexpected symptoms. When arranging urgent assessment, confirm the location, timing and transport rather than merely providing a telephone number. Advise against driving with significant blur or diplopia and use the relevant clinician's recovery advice.