| abstract |
The present invention relates to the use of compounds of formula (I) in the manufacture of a medicament for the prevention and treatment of visual disturbances. In the general formula (I), ring A is optionally substituted, R1 is a hydrogen atom or an optionally protected amino tube, and R2 is a protonated tube. The drugs have preventive and therapeutic effects on weakness of the eye (asthenopia), moreover, they inhibit axial elongation, flutter of retinal function and cure retinal dysfunction. ŕ |