| 摘要 |
<p>A contact lens for correcting astigmatism. The front surface has a central optical zone and an outer carrier having two points of maximum thickness located at an oblique angle of about 110 DEG to 130 DEG as measured from the vertical axis of the lens. The anterior surface of the lens is symmetrical about its vertical axis. The carrier tapers from the points of maximum thickness to thin portions at the top and bottom of the lens. The rear surface of the lens has an outer spherical base curve zone, an inner toric zone, and an intermediate transition zone having thickness that gradually increase from the base curve zone to the toric zone. By making the radius of the base curve zone substantially equal to that of the toric zone's major meridian, a thinner, more comfortable lens is obtained.</p> |
