| 摘要 |
<p>UPI-UOP-102 . TO ALL WHOM IT MAY CONCERN: Be it known that I, J. Warren Blaker, citizen of the United States, residing in the State of New York, have invented an improvement in CONCENTRIC BIFOCAL CONTACT LENS WITH TWO DISTANCE POWER REGIONS of which the following is a SPECIFICATION A concentric bifocal contact lens is disclosed. The lens has a first distance power correction region of circular periphery in the central portion thereof, surrounded in succession by a concentric near power correction annular region and a concentric second distance power correction annular region. Under bright conditions, when the pupil of the eye is small, the central distance power region is helpful in achieving good distance vision.</p> |
