5Jensen H.Myopia progression in young school children. A prospective study of myopiaprogression and the effect of a trial with bifocal lenses and beta blocker eye drops. ActaOphthalmol, 1991, suppl 200:1.
6Tony Tarratt. Bifocals and trifocals-a review. Optician, 1991, sep:13.
7Abraham SV. Control of myopia with tropicamids. A progress report. J PediatrOphthalmol, 1966, 3:10.
8Song HS, Lee JS. Controlling myopic progression in children by using 1% atropinetwice a week. Invest Ophthalmol Vis Sci, 1998, 39(4):S281.
