| 摘要 |
A contact lens has an anterior surface 12 and a posterior surface including a central portion 14 less than 2.5 mm. in diameter and greater than 1.0 mm. in diameter which optically cooperates with the anterior surface 12 to provide a correction for distance viewing, and a paracentral portion 18 which optically cooperates with the anterior surface 12 to provide a correction for near viewing. <IMAGE> |
