There is a wealth of information at :
Guidance for Medical Certification of aircrew | Medical | Personal Licences and Training
On the bottom there is a vision area :
Also at :
Vision | Medical | Personal Licences and Training
You will need to be very familiar with the regulations and AMC from
https://easa.europa.eu/acceptable-me...group/part-med
because you will likely need this information to fight your case.