About the preservative in the Ortho-K Thick Drops:
Polyaminopropyl biguanide is a gentle, effective preservative, parabens-free, and does not release formaldehyde. Cosmocil CQ is an easy-to-use water soluble preservative that has a broad spectrum of activity. It acts against bacteria including the tough gram negative pathogens, yeast and fungi. Cosmocil CQ is a low odor preservative with zero VOCs and is stable in both heat and light. Recommended storage is 2 years. This preservative has low eye and skin irritancy and low oral toxicity. Originally formulated for the eye and contact lens industry, Cosmocil CQ may be used up to 1.5%. Accepted in the EU, USA, Australia, Canada, China and pending approval in Japan. This preservative acts upon the unprotected cell membranes of microorganisms and is not consumed during activity. Microorganisms do not develop resistance to it. Both short and long term studies show little to no toxicity. Cosmcocil CQ was challenge tested in a variety of formulations including make-up remover, mascara and a non-ionic lotion. It was able to control the challenge microorganisms initially and when rechallenged at 28 days. Tested over two generations, this preservative is non-teratogenic, non-carcinogenic with no negative effects to reproductive systems.
Contraindications: None known. Drug interactions: None known. Adverse reactions: None known.
Directions: Instill one drop on the inside of the lens prior to insertion, and if desired, one drop on top of the lens after insertion. Or follow your doctor’s recommendation.
How do they work?
Both the Thin and Thick drops work similarly. They are a combination of some aspects of the Tear Stimulation Drops and the Allergy Desensitization Drop. In addition, they contain Calendula, which is indicated for corneal health and vitality.
What to say?
Depending upon your approach, some people fill the Ortho-K lens with a drop of Thin or Thick. Upon waking up, use a drop of Thin for easy removal. Then use the Thin drops throughout the day to alleviate any irritation, dryness, redness and foreign body sensation.