I guess the big fear is that the student in disclosing the information may be tested with friends. Some may process it and show great interest in understanding more but others may not accept it so easily and decide to not ask of them to participate socially anymore.
We (school staff, visiting specialists, parents, peers) need to be aware of these students and support the loss they are dealing with, and like any other grief – it will all take time to work through and accept. If direct support is refused by the student, the support teacher can work in the background, advising parents, teachers, teacher aides of the implications of such a vision loss and encourage assessment to be modified or reduced for a period of time while establishing the best way to provide for the student. Accessing an independent psychologist or counsellor for the student and/or family can also assist in the grieving process.