A lot of opticians seem to favour Daily Disposables, because they are probably less prone to infection through careless handling and contact lens hygiene habits. They also won't have any problems associated with deposit build up.

Against that, most daily disposables tend to be of standard hydrogel lens material with lowish oxygen permeability, so if you like to wear your contact lenses many hours/day, then they are less than optimum (IMHO).

Weekly or Monthly Disposables are an alternative and are normally cheaper than Dailies. If you wish to wear Weekly or Monthly Disposables then it is probably advisable to go with the silicone hydrogel type lenses (assuming no allergies) and get the benefit of higher oxygen permeability.

Personally I don't have a problem with deposit accumulation on monthly lenses and I used to wear yearly ones. These should be good for at least 9 months before deposits became noticeable, but were not normally a significant problem for me.

For those people who need to sleep in their lenses (e.g. people on call at a minute's notice and who won't have time to put lenses in, e.g. firemen perhaps, then the extended wear weekly or monthly silicone hydrogel lenses may have some benefits. However, the risk of corneal infections is about five times higher when wearing lenses 24/7 than for daily use only - irrespective of whether you use standard hydrogel or silicone hydrogel lenses, (though of course most, if not all, standard hydrogel lenses are not approved for 24/7 wear due to their lower oxygen permeability).

knotlob