Through the use of a special lens, gonioscopy allows visualization and evaluation of the irido-corneal angle (drainage angle). Abnormalities of the drainage angle occur in some breeds and can be a predisposing factor for glaucoma.
An ERG might be necessary to evaluate the function of the retina when the ophthalmologist suspects retinal disease or when the retina can not be visualized due to some opacification of the eye (usually a cataract). An ERG records the total electrical response of the retina to a light stimulus by measuring the difference in potential between the retina and the cornea. An ERG is recorded by placing a special contact lens on the cornea and then flashing a series of bright lights into the eye.
Ocular ultrasound can be helpful in imaging ocular anatomy in cases where due to opacities it is not possible to visualize all structures of the eye during the comprehensive exam. It helps to detect intraocular tumors, retinal detachments, lens luxation, or other abnormalities. Evaluating the orbit via ultrasound can help to detect retrobulbar cysts, masses or infections. In most cases an ultrasound can be performed on short notice with the patient being awake.
Skull radiographs can be helpful to detect fractures, retrobulbar tumors or foreign bodies. Dacryocystorhinography is a technique in which a contrast medium is instilled into the nasolacrimal (tear) duct and radiographs are taken. This allows the localization of diseases of the nasolacrimal system. A board-certified radiologist is available to assist in the interpretation of the findings.
Diagnostic blood, urine or tissue samples can be collected and processed in house or submitted to laboratories. These samples can be very important in reaching a rapid and accurate diagnosis of your pet's condition. An accurate diagnosis assures proper treatment and gives your pet the best possible chance for a full recovery.