BaLM   by Prof. Michael Bach

Basic assessment of Light, Motion, & other perceptual thresholds

Assessing visual perception for very low acuity (below hand motion etc.) is not covered by the usual acuity tests. Thus I developed this test for Retinal Implant. They kindly made it free for general use in 2019. The test and clinical results are described here:
Bach M, Wilke M, Wilhelm B, Zrenner E, Wilke R (2010) Basic quantitative assessment of visual performance in patients with very low vision. Invest Ophthalmol Vis Sci 51:1255–1260 [PDF]

Download options

These downloadable versions do not need Flash to be installed on your computer.