Yes, a corneal abrasion, if left untreated or infected, can develop into a corneal ulcer or even a descemetocele in cats. A corneal abrasion is a superficial injury to the cornea's outermost layer, while a corneal ulcer involves deeper layers of the cornea. If the ulcer worsens and erodes through the entire corneal thickness, it can result in a descemetocele, a serious condition requiring immediate veterinary attention. It is important to monitor corneal abrasions closely and seek veterinary care if signs of worsening or non-healing occur.