i have presbyopia , recent eyesight showed improvement in shortsight of _0.5 in both eyes from _4.00 . The optometrist advised that the strength for reading has to increase to compensate. My reading lens went up +0.25 from a stable +2.25 to +2.5. I can presently read close up clearly with my existing glasses. My question is does the reading lens strength required increase as a consequence of improving distance vision ?