Skandapurana 6.3.190.25

6.3.190.25

akṣirogastathā rājaṃścandrahāsye vinaśyati .
candrahāsye tu yo gatvā grahaṇe candrasūryayoḥ .
snānaṃ samācaredbhaktyā mucyate sarvapātakaiḥ .. 190.25 ..

Likewise, eye disease is destroyed at Candrahāsya, O king. / He who goes to Candrahāsya during an eclipse of the moon or sun / and performs ritual ablution with devotion is freed from all sins.