I have bad eyesight, can I still be a commercial pilot in Malaysia?
According to the Civil Aviation Authority of Malaysia's medical standards:


  (c) Distant visual acuity, with or without correction, shall be:
  (1)
  in the case of Class 1 medical certificates, 6/9 (0,7) or better in
  each eye separately and visual acuity with both eyes shall be 6/6
  (1,0) or better;
  (2) in the case of Class 2 medical certificates, 6/12
  (0,5) or better in each eye separately and visual acuity with both
  eyes shall be 6/9 (0,7) or better. An applicant with substandard
  vision in one eye may be assessed as fit in consultation with the DCA
  subject to satisfactory ophthalmic assessment;
  (3) applicants for an
  initial Class 1 medical certificate with substandard vision in one eye
  shall be assessed as unfit. At revalidation, applicants with acquired
  substandard vision in one eye shall be referred to the DCA and may be
  assessed as fit if it is unlikely to interfere with safe exercise of
  the license held.


The key words appear to be "with or without correction", i.e. it's completely fine if you wear glasses to correct your vision. That seems to be standard around the world, e.g. the US standards also allow correction.