LENS DESIGN

RADIAL EDGE LIFT

The radial edge lift (REL)
is same concept as the AEL 
but the measurement is 
made along the radius of 
the base curve rather than 
parallel to the axis of the 
lens.

REL is more difficult to 
calculate and to visualize 
than AEL, therefore AEL is 
more commonly used.  The 
REL does give the shortest
distance from the cornea to 
the lens edge.