A few years ago an optician convinced me to get some fancy 1.67 index lenses, but I couldn't deal with the chromatic abrasion. The text at the peripheral parts of my monitor were clearly split into their RGB components. For frontend work it was impossible, as I couldn't tell if something was not aligned or it was just the chromatic abrasion.

Now I always go for the thickest lenses (which are also usually the cheapest) for this reason. My prescription is -3.75, and there isn't any noticeable difference with thinner lenses.