Italic type is not as effective. Letter Spacing Text with close letter spacing often presents difficulties for readers who are partially sighted, especially those with central visual field defects. Where possible, spacing should be wide. Monospaced fonts rather than proportionally spaced fonts seem to be more legible for these readers. Margins Extra-wide binding margins are especially helpful in bound material because it makes it easier to hold the volume flat.
Spiral binding can be helpful as well.
Paper Finish Paper with a glossy finish can lessen legibility because many people who are older or who have partial sight also have problems with glare. A non-glossy finish is effective. A glossy finish is not as effective. Distinctiveness Visual impairment often makes it difficult to find a book or other document that is buried among similar publications, especially for sets with volumes that differ only in title or number. Use of distinctive colors, sizes and formats on the covers can be especially helpful to older individuals and those who are partially sighted.