I was so affected by the brightness of my 20" iMac screen I bought a filter that cost me over £100! If only I had this application sooner. It is just great. Thanks a million! Now I can take off the filter and my computer looks great again.

Shades puts the adjuster scale right through the internet site, so I can always adjust it easily. At £0 it is presently a lot cheaper than the filter I bought. Totally recommend this - especially if you suffer from headaches and eye strain.