Visual field analyzer, kinetic perimetery is the systematic measurement of differential light sensitivity in the visual field by the detection of the presence of test targets on a defined background. It uses a mobile stimulus moved by a perimetrist. It is useful for mapping visual field sensitivity boundaries.

Visual field analyzers, Standard static perimetry involves the presentation of stimuli to one spot of the retina in increasing levels of intensity until the stimulus is seen. This method is good for determining the sensitivity of the visual field in a particular area of interest on the retina.

Identification. A visual field laser instrument is an AC-powered device intended to provide visible laser radiation that produces an interference pattern on the retina to evaluate retinal function.

Classification. Class II.

Identification. A vitreous aspiration and cutting instrument is an electrically powered device, which may use ultrasound, intended to remove vitreous matter from the vitreous cavity or remove a crystalline lens.

Classification. Class II.

Vitreoretinal surgery, Radiation plaque is a device used in eye-sparing treatment for choroidal melanoma. It can be used to deliver a high dose of radiation to an intraocular tumor. It is a small, gold covered, dish-shaped device that contains a radioactive source. It contains rice-sized radiation seeds that emit low energy photons. The gold coat of the plaque helps to aim the radiation photons directly at the tumor and decrease radiation damage to surrounding tissues.

Vitreoretinal surgery, Vitreoretinal illumination system provides the bright, white illumination used for vitreoretinal surgery. It utilizes a metal halide discharge lamp, which is a more efficient source of high quality illumination. This exceptional illumination quality provides a color consistency, which is well suited for vitreoretinal surgery. It has also responded to clinical concerns regarding minimizing the incidence of phototoxicity, especially when surgical conditions dictate working close to the retina.

Wavefront aberrometer is used for measuring wavefront aberrations. These wavefront aberrometry measurements are used diagnostically, to determine causes of visual disturbances, and are also used to program ablations in wavefront-guided procedures, whether used for first-time laser eye surgery patients or for therapeutic retreatments.

Wide angle surgical viewing system is used for vitreoretinal surgery. It allows truly remarkable views of the retina, where the surgeon can appreciate nearly the entirety of the fundus with dazzling clarity. It provides flexibility in lighting all or parts of the retina, and enhanced lens design and optics permit the surgeon to work on one part of the retina while making sure that his/her manipulations do not cause retinal breaks at the retinal periphery.

Wide Angle Viewing Systems are needed to visualize the doughnut of fluid at the anterior edge of the PFCL bubble. Wide-angle viewing systems are used by ophthalmic surgeons that typically have a viewing angle requirement of greater than about 100.degree. in vivo.

USB foot switches are available in single, dual, and triple foot switch configurations. It connects to virtually any computer with an available USB port. These are USB compliant and self powered from the USB port.

Wireless indirect ophthalmoscope provides surgeons with a lightweight, portable magnification system for use during operations. It leaves surgeons free to move around the patient completely unhindered. It is also beneficial from a health and safety point of view as there are no trailing cables to snag on other equipment or for theatre staff to trip over. This instrument is fitted with a compact battery pack, which is perfectly balanced with the optics, making it much more comfortable to wear than previous models.

Worth 4 dot test is a clinical test for suppression of either the right or left eye. Suppression occurs during binocular vision when the brain does not process the information received from either of the eyes. During the worth 4 dot test, the patient, wears anaglyphic glasses. The patient is shown a modified flashlight with four holes, approximately 1cm in diameter, organized in a diamond shape.The holes are arranged with the top hole showing only red light, the left and right showing only green light, and the bottom showing white light.

Wrapped bioceramic orbital implant is designed for use in enucleation procedures. The implant is made of the porous, strong, non-brittle biomaterial alumina. The vicryl mesh wrapping allows the suturing of the muscles directly onto the implant. The extensive pore system enhances fibrovascular in growth, which keeps the implant from migrating and allows the secure attachment of extraocular muscles, thereby improving implant motility.

Wright needle is a widely used instrument for insertion of fascia lata or a synthetic material during frontalis suspension surgery. It is usually passed downward from the medial and lateral brow incisions through the preaponeurotic fat pads to the lid incisions.

Zeiss Type Slit Lamp, an all-in-one instrument for observation, measurement, diagnosis and documentation. Its optimally structured design also allows it to be used in laser therapy: this has been achieved by the possibility of operating the slit projector in the central position with either the left or right hand. The instrument configuration allows to use different prism heads and a micromanipulator.

Zero compression microkeratome is the instrument that creates the corneal flap during the LASIK surgery. It allows the ability to create larger, thinner flaps that save corneal tissue, creating less swelling and smoother flaps for quicker visual rehabilitation. The zero compression upgrade is a significant step forward in preventing corneal abrasions.