The PD measurement tool is essential for precise eye measurement in the optometry field. This aluminum ruler is designed for durability and ease of use, featuring clear, dual-sided scales for accurate readings. Ideal for opticians and eye care professionals, it ensures the correct pupillary distance is measured for optimal eyeglass fitting. Simply position the ruler on the nose bridge, align with , and read the measurement to ensure a suitable fit for eyeglasses. Features -Color:White -Material:Aluminum -Size:17.50X2.30X0.03cm/6.88X0.90X0.01in -Optometry necessity: this pd ruler is essential for optometrists, providing precise pupillary distance measurements for accurate lens adjustments - aluminum material: made from aluminum, this ruler is and resistant to deformation, ensuring reliable measurements -Millimeter and inch scales: features dual-sided scales with millimeters on one side and inches on the other, catering to different measurement needs -Compact and easy to carry: the small, rigid design makes it portable and easy to use, suitable for both professional and home use -Multipurpose tool: suitable for optometrists, optical shops, ophthalmologists, and home users, offering a versatile solution for eye measurements Package list: 1 x Pupillary Distance Ruler