Oh I totally understand your frustration, with ptosis especially, getting a clear picture of whether amblyopia is developing is so important, and "he seems to be..." really isn't good enough at this stage. You might want to look up Dr. Fiona Chew Lee Min at Sunway Medical Centre Velocity, as I've heard she does comprehensive vision assessments specifically covering visual field testing and paediatric ptosis, which sounds exactly like what you need. My friend brought her toddler to Pantai Hospital KL and mentioned Dr. Manoharan Shunmugam was thorough with eyelid assessments, though I'm not sure if he sees patients as young as 14 months, so worth calling ahead to check. The key thing is to go in specifically asking for a documented vision report and a ptosis assessment together, a good specialist should be giving you that as a baseline, not just observations, especially since early monitoring really matters to rule out any vision impact from the drooping lid.