When should someone with conjunctivitis see a GP or optician? 

While many cases of conjunctivitis are mild and clear up on their own, knowing when to seek professional advice is essential for protecting your long-term eye health. Most viral and allergic forms of the condition can be managed at home, but certain symptoms indicate that the inflammation may be more serious or that a secondary complication has developed. Identifying these warning signs early allows for prompt treatment and prevents potential damage to the surface of the eye. 

What We’ll Discuss in This Article 

• General guidelines for monitoring conjunctivitis symptoms at home 

• Specific red flag symptoms that require an urgent appointment 

• The role of the GP versus the role of an optician in eye care 

• When a baby or young child with sticky eyes needs medical review 

• Signs that a bacterial infection may require prescription treatment 

• How to identify if your symptoms are linked to contact lens wear 

• Situations where conjunctivitis does not improve with standard care 

When should someone with conjunctivitis see a GP or optician? 

You should see a GP or optician if your conjunctivitis is accompanied by severe eye pain, changes in your vision, or extreme sensitivity to light. Most cases of ‘pink eye’ are self-limiting, but professional intervention is necessary if the redness does not begin to improve after two weeks or if you notice a significant worsening of symptoms despite practicing good hygiene and using over the counter remedies. 

In the UK, many opticians offer a Minor Eye Conditions Service (MECS), which is often the fastest way to get an expert assessment. If you are a contact lens wearer and develop redness, you must stop wearing your lenses immediately and consult your optician to rule out a corneal ulcer. According to the College of Optometrists guidance on conjunctivitis, professional diagnosis is also recommended if you have a weakened immune system or if you are concerned about a newborn baby with eye discharge. 

If your eyes are simply watery, itchy, or mildly gritty, a pharmacist can often provide sufficient advice. However, the transition from a mild irritation to a medical necessity happens when the symptoms affect the internal structures of the eye or when the discharge becomes so heavy that it interferes with your daily activities or sight. 

Red flags and urgent symptoms 

There are several ‘red flag’ symptoms that should never be ignored when you have a red eye. These symptoms suggest that the inflammation is not limited to the conjunctiva but may be affecting the cornea (the clear front window of the eye) or the internal chambers of the eye, which can be sight-threatening if left untreated. 

Specific symptoms that require an urgent visit to a GP, optician, or A&E include: 

• Intense pain in the eye that feels deep or throbbing. 

• A sudden change in your vision or a loss of sight. 

• Sensitivity to light (photophobia) that makes it difficult to keep your eyes open. 

• One pupil appearing larger or smaller than the other. 

• Severe swelling or redness in the skin surrounding the eye (cellulitis). 

• A feeling that there is something physically stuck in your eye that you cannot remove. 

Clinical context is important here. While mild grittiness is normal for conjunctivitis, true pain is not. If you experience any of these, especially after an injury to the eye or exposure to chemicals, you should seek help immediately rather than waiting for the condition to ‘clear up’ on its own. 

The role of the GP vs the Optician 

In the UK, patients often wonder whether they should book an appointment with their GP or their local optician. For eye-specific issues like conjunctivitis, opticians are often better equipped with specialized tools, such as slit-lamp microscopes, to look closely at the surface and interior of the eye. This allows for a much more detailed diagnosis than a standard GP consultation. 

The Association of Optometrists notes that MECS allows patients to be seen quickly by a qualified professional for issues like red eyes, floaters, or flashes. If your optician identifies a more systemic health issue or a severe infection, they can then refer you directly to a hospital eye department (ophthalmology). 

GPs are excellent for managing conjunctivitis that occurs as part of a wider illness, such as a severe flu or a systemic allergic reaction. They can also prescribe antibiotic drops if they determine a bacterial infection is present. However, for most localized eye problems, an optician is often the most appropriate first point of contact for a thorough clinical examination. 

Special considerations: Babies and Contact Lenses 

Certain groups of people must be more cautious when they develop symptoms of conjunctivitis. For newborns, sticky or red eyes can be a sign of an infection acquired during birth, which requires immediate medical assessment to prevent complications. Any baby under 28 days old with red or discharging eyes should be seen by a GP or midwife as a matter of urgency. 

Contact lens wearers are at a higher risk of developing serious corneal infections that can mimic the appearance of conjunctivitis. If you wear lenses and your eye becomes red: 

• Remove the lenses immediately. 

• Do not put them back in until you have been cleared by a professional. 

• Keep the lenses and the case to show your optician, as they may need to be tested. 

A red eye in a contact lens wearer is considered a potential emergency until proven otherwise. This is because bacteria can sometimes get trapped behind the lens, leading to a rapid and severe infection of the cornea. 

When home management is not enough 

Most viral conjunctivitis cases follow a predictable pattern: they get slightly worse over the first few days and then steadily improve over one to two weeks. If you find that your symptoms are not following this trajectory, it is time to seek advice. 

You should consult a professional if: 

• The redness and discharge persist for more than two weeks. 

• Your symptoms go away but then return shortly after. 

• You are using over the counter drops, but they are providing no relief. 

• The discharge becomes very thick, yellow, or green, suggesting a bacterial shift. 

• You have a pre-existing eye condition that makes you more vulnerable to infections. 

Early intervention in persistent cases can prevent the development of chronic inflammation. While a pharmacist can provide ‘first line’ support, they will also advise you to see a GP or optician if the condition appears atypical or is not responding to standard hygiene measures. 

Conclusion 

Knowing when to see a GP or optician for conjunctivitis can save you from unnecessary discomfort and protect your vision. While mild cases are common and usually resolve with home care, red flags like eye pain, light sensitivity, or vision changes require immediate professional attention. Opticians are often the best resource for a detailed eye exam, while GPs can help when the eye condition is linked to a broader illness. Always prioritize safety, especially if you wear contact lenses or are caring for a newborn. 

If you experience severe, sudden, or worsening symptoms, call 999 immediately. 

Urgent care is vital if you have a sudden loss of vision, severe eye pain, or if the eye redness follows a physical injury to the eye. 

Authority Snapshot (E-E-A-T Block) 

This article is designed to help patients identify when conjunctivitis requires professional medical or optometric intervention, based on NHS and NICE clinical standards. It was written by the Medical Content Team and reviewed by Dr. Rebecca Fernandez, a UK-trained physician with extensive experience in emergency and internal medicine. The goal is to provide clear, safe, and actionable advice to ensure patients receive the right level of care at the right time.