A-Scan Ultrasound applies the same physics used in fetal ultrasound. It is required in the preoperative evaluation for cataract surgery to properly calculate the correct power for the intraocular lens to be implanted within the eye. After drops to numb the eye, the transducer itself may be placed directly on the eye, or it may be placed on the eyelid.
B-Scan Ultrasound applies the same physics used in fetal ultrasound. It displays the internal anatomy of the eye to allow evaluation of the retina when it is obscured such as by dense cataract and vitreous hemorrhage. It is also essential in the evaluation of ocular tumors and a variety of other eye disorders. After drops to numb the eye, the transducer itself may be placed directly on the eye, or it may be placed on the eyelid.
Argon Laser Treatment
Argon laser treatment is used to treat retinal problems. Its beams are used to seal weak blood vessels in the eye, repair retinal damage, and treat certain types of glaucoma. Argon laser surgery has been used since 1980 to reduce intraocular pressure which is the main danger of glaucoma. Such pressure can damage optic nerve fibers, causing progressive vision loss.
Of all the technology currently available, corneal topography provides the most detailed information about the curvature of the cornea. Using a highly sophisticated computer and software, in just seconds, thousands of measurements are taken and analyzed. The computer generates a color map from the data. This information helps to evaluate and correct astigmatism, monitor corneal disease, and detect irregularities in the shape of the cornea.