In Lotze's view, what does the visual system need to accurately perceive depth?

Lotze’s perspective on visual perception emphasizes that the visual system requires specific cues for accurately perceiving depth, one of which is the local signs derived from touch. Local signs relate to information obtained through tactile feedback that assists in creating a three-dimensional understanding of the environment. This integration of sensory modalities helps to calibrate and enhance our depth perception.

In Lotze's framework, touch and visual experiences work together to inform the brain about spatial relationships. For instance, the physical sensations of objects, such as their texture and distance based on touch, provide foundational cues that the visual system can build upon to achieve a more accurate spatial representation. Therefore, local signs from touch contribute significantly to the perception of depth, aligning with Lotze’s holistic approach to sensory interaction.

The other options, while they may contribute to visual perception in different contexts, do not directly address the requirement for depth perception in the manner Lotze describes. Color contrast pertains primarily to the differentiation of objects based on hue rather than spatial awareness. Rotational feedback relates to movement and orientation but doesn’t focus specifically on depth cues. Lastly, focus and clarity are important for overall visual acuity but do not inherently convey information about spatial distance and depth. Thus, local signs from touch are essential in Lotze