Why do I feel a foreign body sensation in one eye when wearing a contact lens?

When wearing contact lenses, feeling a foreign body sensation in one eye is generally caused by local inflammation, dry eye syndrome, scratches, or similar conditions. It is recommended to stop wearing contact lenses immediately and apply appropriate eyedrops for treatment. The details are as follows:

1. Local Inflammation in the Eye

During the process of putting on or taking off contact lenses, direct contact with the lenses using hands can easily lead to local infection. Additionally, wearing contact lenses for extended periods can aggravate corneal hypoxia, increasing the likelihood of developing ocular surface inflammation such as conjunctivitis and keratitis, which can cause a foreign body sensation. Treatment involves immediately ceasing to wear contact lenses and administering antibiotic eyedrops such as Levofloxacin Eye Drops, Gatifloxacin Eye Drops, or Norfloxacin Eye Drops.

2. Dry Eye Syndrome in the Eye

Prolonged wearing of contact lenses can destabilize the tear film on the surface of the eyeball, leading to the development or aggravation of dry eye syndrome, which can cause a foreign body sensation. Treatment involves administering artificial tear eyedrops such as Polyvinyl Alcohol Eye Drops, Sodium Hyaluronate Eye Drops, or Carbomer Eye Gel.

3. Local Scratch in the Eye

Incorrectly wearing contact lenses can result in local scratches in the eye, causing a foreign body sensation. Treatment may involve administering antibiotic eyedrops to prevent infection, such as Levofloxacin Eye Drops, Tobramycin Eye Drops, or Ofloxacin Eye Ointment.