Soft contact lens is used -
Soft contact lenses are made up of HEMA (hydroxyethylmethacrylate) which is hydrophilic. These are very good for delivering higher concentrations of drugs in emergency treatment. Reference : A K KHURANA OPHTALMOLOGY,E4,Page-417,564
High myopia
Astigmatism
Presbyopia
Keratoconus
Optics and refraction