Interestingly, the CAAS responded promptly with the following:
We do not prescribe any numbers but as long as you are able to pass the respective eye tests during your Class One medical examination and Ophthalmologist examination, you should not have any issue with clearing CAAS Class One medical assessment. The eye tests to be done during CAAS Class One initial medical will include the following (unless clinically indicated):- Visual Acuity test with Snellen Chart
- Ishihara Chart
- Convergence Test
- Near vision test
- Colour Assessment and Diagnosis (CAD) test
- Maddox Rod
- Maddox Wing
- Aviation Eye Photography screening
They also appended the PDF attached.