Red eye
Increased volume of blood in the conjunctival vessels results in an increased appearance of redness. Red eye may be due to a number of different reasons. Also see CLARE.
Glossary
Removal frequency
see Lens wear schedules.
Rigid gas permeable lenses
These types of lenses can be made from various different rigid plastic materials, formerly PMMA (Dk = 0) but now materials with higher gas permeability are commonly used. These lenses are highly customizable, allowing the practitioner to adjust and fine-tune … Continue reading
Rose bengal
An iodine derivative of fluorescein which binds to mucus and cellular components. It is useful in the diagnosis of dry eye, in which it is seen binding to degenerated cells on the corneal surface. This dye often stings on insertion.
Rotational Stability
Toric lenses require a method of maintaining a fixed rotational position on the eye as the lens interact with the eyelid. This can be achieved by making the inferior portion of the lens thicker and heavier, using gravity to keep … Continue reading
Rubbing
Placing the lens in the palm of one hand, place a few drops of multipurpose solution onto the lens. Next, use the index finger of the other hand and gently apply pressure, starting at the center of the lens and … Continue reading
