Surgery becomes more complicated if the blood supply is not ample and elastic enough to be stretched into the scrotum. In these cases, the supply may be divided, some vessels sacrificed with expectation of adequate collateral circulation. In the worst case, the testis must be "autotransplanted" into the scrotum, with all connecting blood vessels cut and reconnected (anastomosed). When the testis is in the abdomen, the first stage of surgery is exploration to locate it, assess its viability, and determine the safest way to maintain or establish the blood supply. Multistage surgeries, or autotransplantation and anastomosis, are more often necessary in these situations. Just as often, intra-abdominal exploration discovers that the testis is nonexistent ("vanished"), or dysplastic and not salvageable. The principal major complication of all types of orchiopexy is a loss of the blood supply to the testis, resulting in loss of the testis due to ischemic atrophy or fibrosis. Other animals
Cryptorchidism is seen in all domestic animals, most commonly in stallions, boars, and canines. The prevalence of this condition can vary depending on species and breed. Evidence of this condition is more likely in companion animals and swine than ruminants. The cause of this condition can vary from a combination of genetics, environment, and epigenetics. Dogs
Cryptorchidism is common in male dogs, occurring at a rate  up to 10%. This condition is one of the most common congenital defects in purebred dogs (11%), with 14% reported in Siberian Huskies.
When a childs eyes are truly crossed, it is always a serious condition and requires the care of an ophthalmologist." References

American Academy of Ophthalmology