Make it simple and let your mother.......................
Quote:
Originally Posted by KMK
.....................when switching from a progressive lens, which would be the best for her to switch to, bifocal or trifocal? Could you give me the pro's and con's of each?
When switching from a pal to a lined bifocal it will be another getting used to period. By getting a trifocal you are doubling the getting used effect and maybe confusion about it.
Make it simple and let your mother get used to a regular bifocal with a larger than regular near segment, at least 28mm. A bit later down the road she will have an easy time to get adjusted to a trifocal if really needed.
It is also a less expensive solution.