- Soft lenses are more comfortable than hard lenses from almost the
- Soft lenses become inflexible and brittle when allowed to dry
while hard lenses remain essentially the same either wet or dry.
- Astigmatism (which most people have to varying degrees) is fairly
easily corrected with a hard lens, but more difficult, sometimes impossible to correct
with a soft lens.
- Hard lenses must be worn every day since wearer must gradually
build up tolerance; however, most soft lenses can be worn safely without the wearer having
to work up to the required time.
- The adaptation time of soft lenses is quicker but wearer will be
less sensitve to bright light.
- For active sports the soft lens works better (provided the sight
is good) because it's not likely to fall out of the eye; dust and dirt cannot easily get
- Hard lenses have better durability since they are barely affected
by pollutants in the air.
- Soft lenses deteriorate more rapidly and are associated with a
higher incidence of eye infection.
- Hard lenses exert a slight pressure on the cornea with each blink
and this may have a positive or negative effect; soft lenses do not have this problem as
they generate virtually no pressure.