The Perkins Tonometer Blue Filter [5805355] is a high-quality accessory designed for use with Perkins tonometers. This blue filter is specifically designed to enhance the visibility and accuracy of tonometry measurements. Crafted with precision, this filter effectively blocks out unwanted light and glare, allowing for clear and precise readings. It is compatible with both MK-1 and MK-2 Perkins tonometers, making it a versatile choice for eye care professionals. The Perkins Tonometer Blue Filter [5805355] is manufactured by Haag-Streit, a renowned brand known for its commitment to producing reliable and durable ophthalmic instruments. With this filter, you can trust that you are getting a product that meets the highest standards of quality and performance. Whether you are a seasoned optometrist or an ophthalmology student, this blue filter is an essential tool for accurate tonometry measurements. It is easy to install and remove, ensuring convenience and efficiency during examinations. Invest in the Perkins Tonometer Blue Filter [5805355] to enhance the precision and reliability of your tonometry measurements. With its superior quality and compatibility, this filter is a must-have for any eye care professional seeking accurate and consistent results.