39 prism dioptres
reduction was observed at 1 week after injection.
The increase sees, for example, glasses with single vision lenses of a spherical power of not more than 6 dioptres
with a cylindrical power of not more than two dioptres
increase from 37.
20[pounds sterling] spherical power of not more than 6 dioptres
with a cylindrical power of not more than 2 dioptres
The operation is recommended for short-sighted people with a prescription of -7 dioptres
or worse, and for long-sighted prescriptions of more than +4 dioptres
It said the criteria used to select patients for the study included those with prescriptions between the powers of 0 to 6 dioptres
of myopia and between 0 and 1 dioptres
of astigmatism, and that 80% of all patients Optical Express treated with laser eye surgery fell within each of these categories respectively.
In patients with keratometry readings less than 53 dioptres
, there was an average increase of three lines of BCVA whereas those with keratometry readings greater than 55 dioptres
lost on average one line of BCVA.