Ophthalmic Crossed Cylinder

Ophthalmic Crossed Cylinders are a type of ophthalmic instrument used in eye examinations and vision testing. They are part of the supply class Ophthalmic Instruments, Equipment, and Supplies, which falls under the supply group Medical, Dental, and Veterinary Equipment and Supplies.

Ophthalmic Crossed Cylinders consist of two cylindrical lenses that are placed at right angles to each other. These lenses have different powers and are used to determine the astigmatism correction needed for a patient's eyes. By rotating the crossed cylinders, the eye care professional can determine the axis and power of the astigmatism correction required.

These instruments are commonly used in optometry and ophthalmology practices to assess and prescribe corrective lenses for patients with astigmatism. They are an essential tool in determining the precise prescription needed to correct the irregular curvature of the cornea or lens of the eye.

Ophthalmic Crossed Cylinders are typically made of high-quality optical glass or plastic and are designed to be durable and accurate. They are available in various sizes and powers to accommodate different patient needs.

Overall, Ophthalmic Crossed Cylinders play a crucial role in diagnosing and correcting astigmatism, ensuring that patients receive the most accurate and effective vision correction.