Publisher Summary The contact lens is so called because it is in contact with the eye in just the same way as a denture is in contact with the mouth. There are two types of contact lenses: corneoscleral lenses and microcorneal lenses. Corneoscleral lenses are in contact with both the corneal and scleral surfaces of the eye. The corneal part provides an optical correction to abolish corneal irregularities or to protect the underlying cornea according to the nature of the case. The scleral part is concerned solely with the fitting of the lens and the maintenance of its position on the eye. Microcorneal lenses are smal—literally the size of the patient's cornea—and have no scleral flange. The circumference of these lenses coincides with that of the patient's cornea. This chapter discusses that the majority of surgeons favor the microcorneal lenses except for those patients where it is necessary to cover the cornea completely to protect it. The latest technical advance in contact lenses is their manufacture in soft pliable material. These are known as hydrophylic or soft lenses. They are more comfortable to wear and they adapt themselves to the shape of the cornea.