Art of Preserving the Sight Unimpaired to Extreme Old Age: and of Re-Establishing and Strengthening it When it Becomes Weak; to Which Are Added Observations on the Inconveniences and Dangers Arising from the Use of Common Spectacles

This is a copy of the original book. In this series we are bringing old books back into print using our own state-of-the-art techniques. Generally these books are created from careful scans of the original. This allows us to preserve the book accurately and present it in the way that the author intended. However as we are working with old material so occasionally there may be certain imperfections within the text. We are so pleased to ensure these classics are available again for generations to come.