What is the next step for a cat with bilaterally detached retinas and a history of hyperthyroidism?

In the case of a cat with bilaterally detached retinas and a history of hyperthyroidism, the next logical step is to measure systemic blood pressure. This is because hyperthyroidism in cats can lead to secondary systemic hypertension, which can cause vascular changes in the eye, including retinal detachment. By measuring the systemic blood pressure, a veterinarian can identify whether hypertension is contributing to the retinal issues. If elevated blood pressure is detected, it can then be addressed either through medication or additional management strategies, which may help in the stabilization of the cat's ocular condition.

While assessment of intraocular pressure is important for other conditions such as glaucoma, it is not the primary concern in this scenario of retinal detachment linked to systemic status. A CT scan of the head could be valuable for assessing underlying causes or other lesions but is not typically the first step in managing retinal detachment. Similarly, measuring serum T3, while it might be relevant for evaluating the overall thyroid status, does not directly address the immediate concern of potential hypertension affecting the retina. Thus, measuring systemic blood pressure is a crucial and logical initial step in managing this cat's condition effectively.