Display Not Bright Enough

I have Macular DeGeneration which causes my vision to require a lot of light or a high degree of darkness of the text and a light background to read. Example this text I am using now for this message is ok as long as I have increased the side of this display to about 2.5 times the size of the normal screen which increases the text size a lot. Trying to read email requires the magnifier option provided with Win 7 Pro, In Windows Live Mail I cannot increase the size of the windows as you can do on the Web, In talking about Windows Live Mail if I am looking at new mail which allways comes in bold I can see just infe whitout increasing the size of the font.. High contrast text makes much better reading, windows 7 Pro is much worse than XP.Increased the dots per inch that worked ok except it fouls up Expression Web 4 what I use to keep web sites up to date, It just looks to me like this, example if a person would restrict a light bulb to be lit 100% would be bright, 40% would be very dim, that looks to me like the problem in order to reduce current.