The incident occurred when the young woman, who is currently pursuing PG in mathematics at Andhra University in Visakhapatnam, threw the corrosive substance on Venkataramana at the college gate.
The girl, clad in a burqua to conceal her identity, was identified as Soujanya, police said.
"Wearing 'burqua' to hide her identity, Soujanya waited at the gate of the government polytechnic college at Nallapadu, where Venkataramana is a lecturer and threw acid on him when he came out during lunch hour," Guntur (South) DSP, K Narasimha, told PTI.
"In the process to resist her bid, some drops of acid fell on her cheek," the officer said, adding that the duo are admitted to a hospital.
The DSP said that Soujanya was earlier a student of Venkataramana when he was teaching in a degree college in Narasaraopet, where they developed intimacy and agreed to enter into wedlock.
But thereafter, she left to do her post graduation in Andhra University in Visakhapatnam and Venkatramana to Nallapadu.
"Venkataramana got married to another woman last year, and he was avoiding Soujanya," Narasimha said, adding that a case will be lodged soon.
