Why do the round letters look like they have the jaggies when I look at them on the screen?
You are standing too close! All eye charts are designed to be used as distance targets. If you were to look at your old fashioned bulb projector at 6 inches you would see that the edges of the letters are not crisp, but have a slight shadow or smudge. If you look at a computer screen at 6 inches, you will see a slight smudge at the edge of the letters too. If it is a CRT screen, it will look smudged or blurry, if it is an LCD screen, it will look like the letters are made of tiny dots and they may appear to have the ‘jaggies’. This is true in all computer situations. Look at this screen very closely, you will see what I mean. Acuity Pro defines its optotypes as mathematical representations, not bit mapped images. When Acuity Pro tells your computer to display an ‘O’ on the screen, it gives the computer a mathematical formula to draw two circles with black filling the space between them. The mathematical description of the ‘O’ is a perfect circle. Only the limitation of your computer ma
