Dry eyes and vision changes on endocrine therapy

Hormones, including oestrogen and androgens, help the glands in the eyelids produce the oily layer of tears that stops them evaporating too quickly. Tamoxifen and aromatase inhibitors change these hormone levels, so many women notice dry, gritty, burning or watery eyes, blurred vision that clears with blinking, or difficulty wearing contact lenses. Dry eyes are common with age and menopause anyway, and hormone therapy can make them more noticeable. They are rarely serious and usually respond well to simple treatments such as lubricating eye drops, warm compresses and reducing screen strain.

Why eyes can water when they are dry

When the surface of the eye becomes irritated, it can produce a rush of watery tears that do not lubricate properly. So watering eyes can actually be a sign of dryness.

What helps most

Preservative-free lubricating drops used regularly, warm compresses and gentle eyelid cleaning, taking breaks from screens, and protecting eyes from wind, dust and air conditioning.

When to see an eye doctor

Painful red eyes, sensitivity to light, a sudden change in vision, or dryness that does not improve with drops should be checked by an eye doctor.

Dry eyes on hormone therapy are uncomfortable but rarely harmful. They often improve with consistent care, though symptoms may come and go and can be worse in dry weather, air-conditioned offices or after long screen use.

Consistency matters

Drops and compresses work best when used regularly, not only when eyes feel very sore. It may take a few weeks to notice real improvement.

Not every vision change is dryness

Tamoxifen can rarely cause other eye changes, such as cataracts or retinal changes. Blurred vision that does not clear with blinking or drops should be examined.

Stopping hormone therapy is rarely needed

Dry eyes are usually manageable without changing cancer treatment. Discuss any concerns with your team before making changes.

What this page cannot tell you

It cannot diagnose the cause of your eye symptoms. See an eye doctor if they persist.

Many contact lens wearers find their lenses become uncomfortable during hormone therapy.

Shorter wearing times

Wearing lenses for fewer hours, and switching to glasses at home, gives the eyes a rest.

Ask about different lenses

Daily disposable lenses or materials designed for dry eyes may be more comfortable. An optometrist can advise.

Use compatible drops

Choose lubricating drops labelled safe for use with contact lenses.

If regular drops and eyelid care have not helped after several weeks, an eye doctor can look more closely at the cause.

Treating blocked oil glands

Clinic treatments that warm and clear the eyelid glands, or a course of medicine for eyelid inflammation, can help when the oily tear layer is the main problem.

Checking for other conditions

An eye doctor may also look for eyelid problems, allergies or conditions affecting tear production, since treating these can improve symptoms noticeably.

Prescription drops

Anti-inflammatory drops may be used for longer-lasting dry eye disease. Your eye doctor will explain how long they take to work.