HEINE K180 Aperture Wheel 2 Ophthalmoscope Head. Standard direct ophthalmoscope. A full featured instrument at an economical price. Precision HEINE optics. Brilliant retinal image. XHL Xenon Halogen Technology. Bright, white light. Clear retinal image. Ergonomical shape. The instrument fits the orbita comfortably. Soft orbital rest. Steadies the instrument and protects your glasses. Choice of 5 apertures. For both large and small pupils. Dust-resistant housing. Maintenance-free. High-impact polycarbonate housing for durability. 27 lenses from - 35 D to + 40 D. Brilliant image even at high corrections. Lense range: + in 1 D steps: 1 – 10 15 20 40 D, – in 1 D steps: 1 – 10 15 20 25 35 D. Incorporates slit, red-free filter, cobalt blue filter, large spot & small spot. Available in 2.5V Standard Battery Operation C-001.30.207 or 3.5V Rechargeable Battery Operation C-002.30.207. Replacement bulbs sold separately 084 (2.5V) & 086 (3.5V). Ophthalmoscope head only, handles sold separately.