This may not be a deal as such. See if it helps somebody. I have been to Home bargains today and they sell full range of reading glasses for 99 Pence. it include all the commonly used powers such as +1.0, +1.5, +2.0 etc.
Reading glasses- most of the common powers( +1.0, +1.5, +2.0 etc) Home Bargains.- 99p