Hi,
I am not sure 100%, but Emirates follows more or less the EASA requirements for pilot medical.
In the case of color vision Ishiara and then CAD test...new test implemented.
Time ago, like I did, alternative test were recognized like Beyne Lantern, Holmes Wright and Anomaloscopy.
I am not sure if your alternative test is recognized....bring with you the original reports and if needed show it to the doctor.