pip advice

Hello need some information about pip, My daughter has just turned 16 and has Keratoconus. its a progressive eye condition which make the cornea bulge, it affects her sight and mobility, shes been given a cane to get around as she has very little sight in her left eye due to hydrops. she has been registered as partially sighted. shes has been told by her rehabilitation officer to apply for pip. i don't understand if she will be awarded it or if its a too stressful to put her though this as shes taking her GCSE exams in a few weeks. any advice is welcome thanks you