In tandem with ageing, diminished sight follows successively; this is called age sight degradation or presbyopia. Presently there are three ways of reconfiguring sight ageing through contact lenses: multi-focal lenses, progressive lenses, or through a technique known as monovision. Technological advances have contributed to the availability of enhanced sight capacity.
With progressive lenses, the upper half of the lenses focus on the length of distance while the lower half of the lenses tackle nearsightedness; at the overlap of the two halves, at the centre of the lens, the eye focuses on the middle distance. An additional advantage with these types of lenses is that the user avoids having lines across the surface of the lenses, which is often the case with multi-focal lenses.