<p>Generally speaking, the frame height of bifocal/progressive lens must be at least 30 mm.&nbsp;</p> <p>a.&nbsp;&nbsp;&nbsp;Choose frames via this <a href="/bifocal-glasses.html">link</a> for bifocal/progressive glasses.</p> <p>b.&nbsp;&nbsp;&nbsp;Check the right side of product details, which states clearly if the frame can be made into bifocal/progressive glasses or not.</p> <p><img alt="" src="https://df5apg8r0m634.cloudfront.net/email/2020/0428/ChkClMKOFWYY7sPr.png" /></p>
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