Eye, apart from seeing , also forms judgement based on the act of seeing, it acquires knowledge of what is seen.
Whether it is a Right/wrong Knowledge , correct or incorrect is a different matter.
In this function of acquiring Knowledge eyes is a Gyanendriya( Organ of Knowledge)
Mantras being the sounds grasped from Ether by Seers, are sacred and our organs should e purified and protected.
In Hinduism, Deities are bathed daily and they go through the daily routine of Man,
Every morning, around 4.30 am this Pooja is performed.
This is also called the Ushat Kala Pooja.
The screen separating the Deity and the Devotees are removed and the Deity offers Darshan with the Dress and Ornaments of the earlier day.
Then the screen is closed.
A detailed Bathing Ritual follows.
1.Danda Dhavanam-Brushing the Teeth.The Deity’s teeth are brushed( Symbolic) with Neem Stick while the DandaDhavana Mantra is recited.
2.Removal of the earlier dress.