I don't doubt your claim, but do you have the academic references for that covering the timeline of development milestones? I'd be curious to read more of this research.
So I'm going by what is generally well known and accepted about visually impaired development (the time line and stages). Here are a couple of references below which might be helpful. Infant development is a pretty noisy process though which makes definitive statements difficult.
[0] https://onlinelibrary.wiley.com/doi/pdf/10.1111/dmcn.12860 [1] https://www.tsbvi.edu/curriculum-a-publications/1053-early-d...