CONTRAINDICATIONS TO LENS WEAR OCULAR REASONS One eyed patients Great caution should be used in fitting patients with only one functional eye. As I tell these patients, “You no longer have a spare eye, if something happens to the good eye you will be functionally blind”. It is best to not fit these patients, however, we often do when they have high ametropias or for other reasons. Do not fit them with extended wear. Use daily wear only. Patient education and compliance is critical. They must wear safety spectacles even with the contact lenses for protection.