In case of difficulty, illness or of authorized necessity this prayer is read. The beloved Prophet (sallal laahu alaihi wasallam) had taught this to a blind person who, as soon as he performed it, regained his eyesight. (Tirmizi Shareef Tibrani)
To perform this prayer it is recommended to wear one’s best and clean clothes and to perform pleasingly one’s ablution (Wudu). Then 2 Raka-ta Nafil is read in the usual way, after salaam this dua is read:
Allahuma Inni As-aloka wa (Atawassalo) Wa Atawajjaaho ilaika be nabbiyeka Muhammadin nabi yir Rahmate ya Rasullulah. Inni tawajjahto be ka ila Rabbi fi hajaati haa-zehi (here we make our requests (le tuqza li) Allahumma fashaffiho fiya
Translation: O Allah I implore You and I come near You through the intermediary of Your Prophet (Nabee) Muhammad (sallal laahu alaihi wasallam) who is the Prophet of Grace. Ya Rasullullah, through your intercession I implore Allah to accept my request. O Allah grant the intercession of your Prophet (sallal laahu alaihi wasallam) in my favor.