Presentation on theme: "Contact Lenses E2A48 Sherry. Forward Nowadays, people use items are particular about the lightweight, comfortable, save time, and also created items."— Presentation transcript:
Forward Nowadays, people use items are particular about the lightweight, comfortable, save time, and also created items variety. Contact lenses gradually replaced by soft lenses. It also can be transformed into many different styles.
Development In 1508,Da Vinci( 達文西 )came up with an idea of wearing the lenses directly in the eye. In 1636, Rene Descartes( 笛卡爾 ) had similar recommendation. In 1887, Adolf Eugen Fick( 阿道夫 ˙ 歐根 ˙ 菲克 ),a Germany scientist,made the first lenses,but Oxygen rate is too low, the eyes may be infected.
In 1938, Mullen( 馬倫 ) and Obring, made the first plastic contact lenses. In 1940, Obring used Acrylic of plexiglass( 塑膠玻璃 ) developed the first plastic contact lenses. In 1961, Otto Wichterle a chemist invention of soft contact lenses.
Advantage Contact lenses is more convenient than glasses, no weight, had no effect on the appearance of the wearer. Without lens may be broken is suitable for athlete.
Disadvantage Due to contact lenses are worn directly on the cornea, if the lenses or your hands is not clean, it will be easier to be infected.
Anyway, remember to pay attention the clean, and the best way is doctor's assessment, It will not harm your eyes or cause the irreparable regret.