If you have a disability that means you cannot meet the passport photo rules, give details in your application and send evidence.
If you apply online
Your photo will be automatically checked during your online application. If your photo fails the check you should:
submit the photo and explain why you cannot meet the rules in the additional information box
include a letter from your doctor or consultant that says what your condition is and whether it’s permanent or temporary
If you apply using a paper form
You should:
explain in section 8 of the application form
include a letter from your doctor or consultant that says what your condition is and whether it’s permanent or temporary