Cross eyes in Zoo Lions may be a sign of inbreeding. I have not heard of it in Asian Lions before but it was not infrequent in the past in some inbred African Lions.
Whilst inbreeding is a major issue for the current European stock of Asian Lions (fingers crossed that the new imports will arrive soon and will go someway to solving this) it is interesting to note that Kiburi and her siblings are some of the least inbred of all the current stock...
Kiburi, Kiba and Kumari's parents:
Kalindi KOLN, 2002 (Rajesh CHESTER 1996 X Yamuna ZURICH 1998)
Parys LODZ, 2002 (Bruno LONDON, 1993 X Luei HELSINKI, 1994)
The Chester, Helsinki and Zurich lines are not blood related. Chester and London's cubs are first cousins because their mothers (Chandani and Ruchii) were full sisters. Helsinki's have no relation anyone else (that is apparent without going back through a studbook anyway)
Compare this to London's latest cubs...
Parents: Abi LONDON, 1999 X Lucifer COTSWOLDS, 2002
Abi: Ruchii WILD X Kamal, HELSINKI, 1994
Lucifer: Sabu CHESTER, 1994 X Akela, HELSINKI 1994
Kamal and Akela are brother and sister.... and Sabu is related Ruchii through his mother, Chandani
See the Asian Lion project thread for more info