Wirostko’s group noted that cataracts developed in the eyes of 14 of the 15 mice who had been exposed to the cell wall deficient forms, whereas no cataracts developed in the eyes of 200 control mice that had not come in contact with the pathogens. This data caused the team to suggest that cell wall deficient organisms can penetrate the lens capsule to produce cataracts, and that these same organisms could cause human cataracts.