There are some things you can do to have thinner lenses without paying outrageous prices for high-index lenses. With a near-sighted prescription (such as your -7.75) the thickest part of your lens is around the edges; the part of the lens directly in front of the pupil is only 1mm thick (2mm for "safety" lenses).
To keep the lens thin, use a smaller lens. For example, my "TV viewing," -5.50, 1.56 index semi-rimless glasses are 50mm wide and 5mm thick at the edge, but my older "Socializing" 1.56 index, -5.50, 55mm wide lenses are 11mm thick at the thickest part of the edge. Same diopter value, same index, not much smaller but a whole lot thinner. I suggest 1.56 or 1.64 index lenses no wider than 50mm for a thinner look. You can also disguise the thickness of the lens by using a thicker plastic frame, rather than a rimless or semi-rimless or even a full- rim metal frame. My plastic "Socializing" frames are 6mm thick around the rim, so less of the edge of the lens is visible. WHL On Jan 29, 7:20 pm, saffron1 <[email protected]> wrote: > Hi, I am new to the forum here, and am trying to get the absolute > thinnest pair of glasses, with the best optical clarity. I would like > to know if anyone knows the abbe value of a 1.74 high index, 1.8 or > 1.9 glass lens. I have had problems in the past with chromatic > aberration in both a polycarbonate and 1.67 high index lens. I am > wearing a Trivex lens now, which is optically great but much thicker > than I would like. I am thinking of ordering glass lenses from visions > of canada but they are quite expensive so I want to be sure these > lenses would be best before I order them. My prescription is -7.25 > with -1.75 astigmatism in both eyes. > > I am also wondering if the glass lenses will make the eyes appear more > normal in size than the plastic do. I have heard that aspheric lenses > are better for this, but I also heard that is mostly in farsighted > cases. > > Thanks -- Check us out at the oft-updated http://glassyeyes.blogspot.com! You received this message because you are subscribed to the Google Groups "GlassyEyes" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/glassyeyes?hl=en
