 by using Fickian release kinetic models that although water content changes once contact lenses are inserted onto the cornea of the eye, this will not pose significant challenges when it comes to the release of rugs from SCLs.The most important factor that must be taken into account when designing any type of drug delivery device, and specifically ocular devices, is the release rate of a drug.As discussed previously, the deliver rate and kinetics associated with drugs to the eye can reach levels that are toxic to the eye or could even cause undesirable side effects.