Yes, if you have a disability and it interferes with your ability to do your job, but not with an essential function of the job. If it interferes with an essential function of your job, then your employer does not have to make an accommodation. If the accommodation you request is unreasonable or would pose an undue hardship on the employer, then the employer does not have to accommodate you. Your employer also has no duty to read your mind, so if you need an accommodation, you have to say so. You should ask for an accommodation well before you are fired for not fulfilling that portion of your job! Please consult an attorney if you feel you need an accommodation or if you’ve requested an accommodation and have been denied your accommodation to understand your rights.