The recently characterized opsin group of xenopsins is likely a major player in animal eye evolution and may have been present in an ancient, highly plastic eye photoreceptor cell type.

Bigger bumblebee eyes have better vision, yet their field of view, sensitivity, and resolution do not all simply scale up with eye size, being improved locally instead.

The employment of xenopsin in ciliary and mixed microvillar/ciliary eye sensory cells in several protostome animals suggests high evolutionary plasticity of photoreceptors.

Multiple respiratory and vascular mechanisms have recurrently evolved across the vertebrates to alleviate the oxygen diffusion limitations inherent to the morphology of the retina.

Repeated evolution of eye regression in subterranean mammals helps identify genes and regulatory elements involved in visual perception and development of the eye, and predicts candidate sequences with a potential role in ocular disorders.

An accurate, robust, and lightweight technique for measuring eye movements in mice was developed using magnetic sensing, yielding the first high resolution recordings of eye movements in freely moving mice.

A new member of the family of light-sensitive proteins called opsins has stirred up our view of photoreceptors.

Three-dimensional mapping of the neural circuitry that controls movement of a marine worm in response to light provides insights into the evolution of complex visual systems.

A properly designed two-photon fluorescence microscope allows high-resolution visualization of neurons and capillaries in healthy and diseased mouse retinas in vivo, while to visualize subcellular structures, adaptive optics is required to correct the eye-induced optical aberrations.

By using a specialized camera that corrects for eye blur, millions of single-blood-cells are imaged, and their speed measured, as they travel through the largest-to-smallest vessels of the retina.