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Keratoconus & Scleral Lens Fits

Keratoconus

This condition is characterized by the resulting cone shape of the cornea. The cornea begins to thin, making it weaker. Because of the weakened state, it begins to bulge outward in a cone-shape. This distorts vision and causes sensitivity to light. It usually begins between ages 10 and 25, gradually progressing over several years. For most, the progression will stabilize after a decade or two.

Tests for keratoconus include a slit-lamp exam, corneal mapping, and optical coherence tomography. These are all standard with a comprehensive adult eye exam. To investigate your corneal shape further, we can employ keratometry to assess the curve of your cornea.

Symptoms of Keratoconus

The most significant sign is the irregular shape of the cornea, however, this may be hard to detect as it slowly progresses.

  • Blurry or distorted vision
  • Increased sensitivity to lights, especially flashing lights
  • Difficulty seeing at night
  • Frequent prescription changes
  • Sudden clouding or worsening of vision

Risk Factors

While the actual cause of keratoconus is unknown, there are a few risk factors that are correlated with this condition:

  • A family history of keratoconus
  • Frequent and forceful rubbing of the eyes
  • Male
  • Asian or Latino descent
  • Asthma
  • Sleep apnea
  • Heredity factors such as Down’s syndrome

Scleral Lenses for Keratoconus

Scleral lenses are a type of gas permeable (GP) lenses, which are larger than typical contact lenses. They fit over the cornea and the sclera (the white part of your eye). Most contact lenses rest directly on the cornea (that’s the contact part of contact lenses), but scleral lenses rise up through the center and do not touch the sensitive cornea. With a proper fitting by an optometrist, scleral lenses are a much more comfortable option for keratoconus while providing very clear vision.

Scleral Lens Use

Inserting and removing your scleral lenses can be trickier than typical contacts due to their larger size. At Look Optometry, we ensure you feel comfortable inserting and removing your scleral lenses before you leave your fitting. We have included a brief step-by-step guide here to help you practice at home.

Inserting Scleral Lenses:

  • Put your contacts in before you use makeup or heavy facial products, as these can get on your lenses, making them blurry.
  • Always sit down to insert your lenses. Because they are rigid, it is possible to drop them and break them
  • Use bright light to better see the tiny alignment hole
  • Use the plunger provided to you by the optometrist
  • Fill the contact lens with saline
  • Look down, keeping your head parallel to the floor, open your eye very wide
  • Bring the lens to the eye, pushing gently until the saline stops dripping out of the hole in the bottom of the plunger
  • Remove the plunger, blink, and check for bubbles

Removing Scleral Lenses:

  • Sit down
  • Wet the plunger with saline
  • Pull your bottom eyelid down and do not let go until the lens has been removed
  • Apply the plunger to the bottom half of the lens
  • Apply some pressure to the lens and pull it away from your eye
  • Twist the lens off the plunger and store it in your case with the cleaning solution
  • Remove your makeup after removing the lens

Finding Us
Is Easy

Located in the Heart of Surrey, along King George Boulevard, we welcome anyone in the Langley, Delta, Cloverfield and Surrey area to come visit.

Look Optometry +
Eyewear

500 - 7380 King George Blvd,
Surrey, BC, V3W 5A5

Contact Information

Phone: (604) 501-0900
Fax: (604) 593-3793

Clinic Hours

Monday: 10:00 AM - 6:00 PM
Tuesday: 10:00 AM - 6:00 PM
Wednesday: 10:00 AM - 5:00 PM
Thursday: 11:00 AM - 7:00 PM
Friday: 10:00 AM - 6:00 PM
Saturday: 10:00 AM - 4:00 PM
Sunday: Closed

Appointments available outside normal
business hours by request.