The requirement is spelled out in SIA's website :
PLEASE APPLY FOR THIS POSITION IF YOU ARE RESIDING IN SINGAPORE.
- Singapore Citizen, Singapore Permanent Resident or Malaysian Citizen
- GCE ‘A’ level, Polytechnic Diploma or Degree. In addition you must have obtained a minimum of 5 Credits in the GCE ‘O’ level or its equivalent. These must include English, Mathematics and a Science subject, preferably Physics, taken in one sitting.
- At least 1.65 m in height
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Myopia of not more than 500 degrees and astigmatism of not more than 125 degrees, fully correctable with optical aids. For candidates who have undergone corrective eye surgery (e.g. Lasik),
the pre-surgical visual acuity should not be more than 500 degrees
- Medically fit
here's the link
http://singaporeair.recruitmax.com/M...?szOrderID=405