The Difference For Soft And Hard Contact Lens
Through the comparison table of the two contact lenses, we can find compared with soft contact lenses, RGP lenses have the following obvious advantages:
01 High oxygen permeability.
Its oxygen permeability is high, which is 4 to 5 times that of general soft contact lenses. Long-term wear can minimize corneal damage caused by hypoxia.
02 Sufficient tear exchange.
Due to its small diameter, the lens is easy to move on the surface of the cornea with blinking, so that fresh tears will continuously enter under the lens and exchange the tears containing bacteria, protein residues and other metabolic waste products. At the same time, the rear surface of the lens is washed, the corneal tissue is kept clean, and the cornea is maintained. Normal physiological metabolism.
03 Does not contain water.
Compared with soft contact lenses, RGP lenses have another great feature: they do not contain water. Therefore, substances such as dust, bacteria, protein and metabolic waste will not be inhaled into the lens, which greatly reduces the risk of infection.
04 High imaging quality.
The RGP lens has good formability and is not easy to deform. It can form a high-quality refractive surface on the surface of the cornea and obtain extremely high imaging quality. For high corneal astigmatism, high optical errors, and even keratoconus, corneal trauma, corneal scars, the refractive correction effect is far superior to frame glasses and soft contact lenses, which is also the biggest advantage of RGP lenses.
But similarly, soft contact lenses also have its advantages:
01. It has good comfort and can fit the cornea better.
02. It has good aesthetics and can make color films.
03. Therefore, contact lenses are divided into soft and hard. If you need it, you can choose the contact lens that suits you through the eye health check and your own lens needs.
Thanks for reading.
Sophie Yang
004@mikeoptical.com
