In general, the thickness of contact lenses is directly related to the lens of oxygen permeability and comfort, so many people will buy the thickness of contact lenses as an important basis for judging the quality of products.But did you know that thinner contact lenses are not always better?
Only from the perspective of oxygen permeability, contact lens thickness is reduced, it can provide more oxygen for the eye, naturally also better for corneal health.However, with the advent of silicon hydrogel materials, the oxygen permeability of the lens has been able to reach more than five times that of traditional materials. In terms of improving the oxygen permeability, the influence of different materials is much higher than that of thickness.
Thinner lens, general also relatively soft, will increase the difficulty of wearing, may not be very friendly to the novice.And we all know that the thinner the lens, the more likely it is to break, so in the maintenance of the operation, the more likely to cause lens damage.Even if safely worn in the eye, there is also the possibility of cracking in the eye.Therefore, the most important thing in choosing a contact lens is the quality of the lens itself.
The thickness of a contact lens is also related to its ability to retain water.Too thin lenses will accelerate the evaporation of tears, which will further increase the protein precipitation. Meanwhile, the lenses will absorb more tears to maintain water, which will lead to dry and uncomfortable eyes. Therefore, such ultra-thin lenses are not suitable for people whose eyes are prone to dryness and sensitivity.
In a word, there is no best contact lens, only the most suitable.Both lens thickness and other parameters need to be determined according to the actual conditions of the eye, so there is no need to pursue ultra-thin styles.