Persistent Red Eyes? Common Causes and When to See an Eye Doctor

Red eyes are one of the most common eye concerns among adults and children in Singapore. 

 

While occasional redness may be due to fatigue or mild irritation, persistent or recurring red eyes may indicate an underlying issue that requires medical attention. 

 

Understanding the potential causes and knowing when to visit an eye specialist helps prevent more serious complications. 

 

For those seeking proper evaluation and care, consulting the best eye centre in Singapore can provide timely diagnosis and treatment. 



 

Common Causes of Persistent Red Eyes 


Dry Eye Syndrome 

 

Dry eye occurs when the eyes are unable to produce enough tears or when tear quality is poor. This leads to irritation, redness and a gritty sensation. 

 

Common triggers include prolonged screen time, ageing, air-conditioned environments and certain medications 

 

If the dryness persists despite using lubricating eye drops, it may require professional assessment at the best eye centre in Singapore. 


Allergic Conjuctivities 

 

Allergies are a frequent cause of red, itchy and watery eyes. 

 

Triggers include dust mites, pet dander, pollen and contact lens solution. 

 

While antihistamine drops can offer relief, persistent allergy-related redness can mimic other eye conditions, so getting the correct diagnosis is essential. 


Blepharitis 

 

Blepharitis occurs when the eyelid margins become inflamed due to oil gland blockage or bacterial overgrowth. 

 

Symptoms include chronic redness, crusting, burning sensations and recurring styes. 

 

Management often requires a combination of warm compresses, lid hygiene and prescribed medications. 

 

Contact Lens Irritation 

 

Wearing contact lenses for too long, sleeping in them, or improper cleaning can irritate the eye’s surface. 

 

This may lead to conjunctivitis, corneal abrasions or even infections. 

 

Contact lens users experiencing ongoing redness should remove their lenses immediately and seek advice from an eye doctor. 

 

Conjunctivitis (Pink Eye) 

 

Conjunctivitis may be viral, bacterial or allergic. 

 

While mild cases usually resolve on their own, bacterial conjunctivitis may require antibiotic treatment. 

 

Redness lasting more than a few days, especially when accompanied by discharge or pain, warrants a prompt check-up. 

 

Eye Infections or Inflammation 

 

Conditions such as keratitis (corneal infection), uveitis or scleritis can cause severe and persistent redness. 

 

These conditions may be associated with autoimmune disorders, injuries or infections and require urgent medical evaluation. 

 

If left untreated, they may threaten vision. 

 

When Persistent Redness Suggests Something More Serious 

 

Eye redness becomes more concerning when it continues beyond a few days or is accompanied by symptoms such as pain, sensitivity to light, blurred vision, excessive tearing or a sensation of something stuck in the eye. 

 

Redness following an eye injury or after wearing contact lenses also requires immediate attention. 

 

These signs may indicate infections, inflammation or structural problems that need proper diagnosis rather than home remedies. 

 

Why You Should Avoid Self-Diagnosing Eye Redness 

 

Many people assume red eyes are caused by tiredness or allergies, but several serious eye conditions present with similar symptoms. 

 

Using the wrong eye drops, especially steroid-based ones without medical supervision, can worsen infections or mask underlying disease. 

 

An ophthalmologist can determine whether redness is due to dryness, inflammation, infection or structural issues. 

 

Consulting the best eye centre in Singapore ensures access to advanced diagnostic tools and customised treatment plans. 

 

When to See an Eye Doctor 

 

Any redness that persists, recurs or worsens should be examined by a specialist. 

 

This is especially true if the condition is accompanied by discomfort, discharge, vision changes or swelling. 

 

Contact lens users should be particularly cautious, as they have a higher risk of developing corneal infections.  

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