Category: Optical Instruments Optical instruments are devices that help people see more clearly. They can be used for a variety of purposes, including reading small print, seeing objects at a distance, and examining the eyes. There are many different types of optical instruments available on the market today, ranging from simple magnifying glasses to complex microscopes. One type of optical instrument that is commonly used by eye care professionals is the pocket eye chart. Pocket eye charts are small, portable devices that can be used to test a person's vision at different distances and in different lighting conditions. They typically consist of a series of letters or symbols arranged on a card or sheet of paper, which are viewed through an eyepiece. There are many different types of pocket eye charts available on the market today, each with its own unique features and benefits. Some pocket eye charts are designed for use in a clinical setting, while others are intended for home use. There are also pocket eye charts that are specifically designed to test near vision or far vision, as well as those that can be used to examine the eyes themselves. One of the most popular types of pocket eye chart is the Rosenbaum/Snellen Pocket Eye Chart. This type of chart is widely used by eye care professionals because it provides a quick and easy way to test a person's vision at different distances. It consists of a series of letters arranged in a grid, which are viewed through an eyepiece. The size of the letters decreases as they move further away from the viewer, allowing for accurate measurements of visual acuity. Another type of pocket eye chart that is commonly used by eye care professionals is the EMI Rosenbaum AND Snellen Pocket Eye Charts - 2 Pack. This type of chart consists of two separate charts, one for testing near vision and one for testing far vision. The charts are designed to be used in a clinical setting and provide accurate measurements of visual acuity at different distances. There are also many pocket eye charts that are intended for home use. These types of charts can be useful for people who want to test their own vision or monitor changes in their vision over time. Some examples of these types of charts include the Pocket Size Plastic Eye Chart, 6 3/8" x 3 ½", and the Valencia Med Two in One Pocket Eye Chart, Rosenbaum/Snellen, SNELLEN Pocket Eye Chart - Eye Test. Overall, pocket eye charts are a valuable tool for anyone who wants to test their vision or monitor changes in their vision over time. They are easy to use and provide accurate measurements of visual acuity at different distances.