Over-wearing contact lenses can lead to an acid build-up

As soon as I hit 48 my eyesight deteriorated rapidly! I have about 7 pairs of reading glasses and still struggle to find a pair when I need them!

Millions and millions of people around the world wear contact lenses. Do you?

Did you know that lactic acid can build-up behind your contact lens and lead to negative consequences?

Over-wearing contact lenses can result in damage from lactic acid within the cornea of the eye.  A contact lens is a foreign body that is placed in your eye, a man-made object that sits on top of the cornea and interacts with the inner tissue. The cornea is made of living breathing sells. It supplies most of the refractive power of the eyes.

There are metabolic changes in the human body every day. Waste material and debris from the cells in the cornea are excreted. We often find little bits in the corners of our eyes and debris can sometimes collate underneath a tight-fitting contact lens. This, in turn, can create a toxic environment for the cornea.

How should you deal with an acid attack behind your contact lens?

When a lactic acid level is too high, swelling occurs in the cornea causing it to spread apart. Bacteria and viruses can easily be absorbed into potential spaces within the swollen cornea. This can cause an infection and or scarring. Wearing a lens for too long can lead to oxygen deprivation to the eye, new blood vessels will begin to grow into the cornea to try to find the oxygen that it needs. This can become a big problem.

Everybody is different when it comes to the types of lenses – the wear-time, if the wearer has allergies, the fit of the lens, cleaning and their disinfecting habits. If you wear contact lenses, you should feel good in them and your vision should be at peak performance. Contact lenses should never be uncomfortable but there are several reasons why they could be.

The most common reason for discomfort among lens wearers is the fit. Most people should be able to wear contact lenses for up to 12 hours comfortably. If the diameter of the lens and the curve isn’t the right size it can cause an issue. The lens should cover the cornea and should move slightly when you blink. A lot of wearers experience dryness, irritation and itchiness etc…

Reasons that can cause discomfort could be:

  • Allergies – are a major reason why people feel irritation from their contact lenses
  • Type of lens – if you are wearing Rigid Gas Permeable, or RGP or GP lenses. It takes a while for wearers to adjust to the thickness of the material. Soft lenses are better if you are struggling with the adjustment
  • Cleaning solutions – solutions are for cleaning and disinfecting your lenses. However, some solutions can be an irritant and don’t remove build-ups
  • Wear-time – Like a lot of things, if you wear them for too long, they will cause discomfort

Your eyes can be irritated by dust, pollution, computer use, a busy work schedule and travel. All these things can leave the eyes feeling dry and tired.

What have you noticed has changed with your eyesight as you are ageing? Have you had laser treatment?

Let us know.

Best wishes,


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** The content on this site should not be used as medical advice, we are giving our readers information and insights. If you are concerned about your health or need medical advice please see your doctor. If you are struggling with any issues please talk to someone – don’t suffer in silence. **