And from him, from Ibn Abi Umayr, from Abd al-Hamid ibn Abi al-Ala, from Abu Abdillah عليه السلام, peace be upon him:
Imam عليه السلام said: “There is no harm in (applying) kohl for the fasting person.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 329