Color Contact Lens Basic Info

How do I know the wrong size of Contact Lenses is causing me Discomfort?

wrong size contact lenses

BC & DIA together decide the right size of contact lenses

Authentic Korean soft contact lenses should remain moist & comfortable. Due to the comfort, they ensure; more than 35 million people wear prescription contacts in United States alone. Discomfort however is not unlikely to occur with contacts since many factors can contribute to causing your eyes itch or irritate. An ill-fitted prosthetic contact lens is a major factor that adds to patient’s annoyance. It is necessary to trace the reason of the discomfort so that you could make an intelligent choice the next time, you are offered vision correction lenses.

Can Contact Lenses be too big for me?

Contact lenses are available in varying strengths, base curves & diameter. The most important thing that decides the fit of contact lenses in a patient’s eye is the base curve. DIA is yet another factor but patients have reported problems more with base curve than size.


Diameter is the measurement of the size of the contact lenses. Circle lenses are available in different sizes from 14.00 mm to 20.00 mm being the biggest. An average fit contact lens should cover past your iris. If on the other hand your contact lens sits exactly on the edge of the iris called limbus; you may risk leaving it scratched.

Base Curve

Base curve is the measurement of the curvature of contacts. An average base curve is 8.6mm. If your lenses are too lose and keep moving up with every blink of eye, your contacts are a larger base curve. On the other hand steeper or smaller base curves make your eyes feel tighter. An ill-fitted base curve also obstructs oxygen flow & causes discomfort.

Apart from wrong size, some other factors that lead to contact lens discomfort is digital eye strain, dirty contact lenses & contact lenses with either too high or too low water content. You know wrong size of contact lenses is causing you discomfort if it keeps falling out or restricts swift floating on cornea.

Here are some tips to help you find the right size of circle contacts