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Light Acquisition

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.

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Related Experiment Video

Updated: Jun 17, 2026

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

Published on: February 11, 2014

AccessScope project: Accessible light microscope for users with upper limb mobility or visual impairments.

Awais Mansoor¹, Wamiq M Ahmed, Ala Samarapungavan

¹Department of Basic Medical Sciences, School of Veterinary Medicine, Purdue University, West Lafayette, Indiana 47907-2096, USA.

Disability and Rehabilitation. Assistive Technology

|December 30, 2009

Summary

This summary is machine-generated.

AccessScope enables individuals with upper limb mobility and visual impairments to independently operate light microscopy workstations. This technology empowers students and scientists with disabilities to engage in microscopy for research and education.

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Area of Science:

Biomedical Engineering
Microscopy Technology
Assistive Technology

Background:

Light microscopy is essential in scientific research and education.
Individuals with upper limb mobility or visual impairments face significant barriers in operating traditional light microscopes.
Existing assistive technologies do not fully address the complex operational demands of research-grade microscopy.

Purpose of the Study:

To develop and evaluate AccessScope, a web-based application for remote control of a light microscopy workstation.
To enable independent use of light microscopy for students and scientists with upper limb mobility and visual impairments.

Main Methods:

Recruited users with upper limb mobility impairments and low vision to co-design the AccessScope user interface.
Assessed participants' ability to perform microscopy tasks using AccessScope.
Compared AccessScope performance against inspecting pre-scanned images, evaluating histological understanding and microscope operation knowledge.

Main Results:

Users with disabilities successfully operated light microscopy functions remotely via an internet browser.
Participants utilized various PC pointing devices and accessibility software tailored to their needs.
Post-AccessScope testing showed improved histology identification and microscope operation knowledge.

Conclusions:

AccessScope provides unprecedented independent access to light microscopy for individuals with physical and visual disabilities.
This technology is crucial for inclusive participation in science, technology, engineering, and mathematics (STEM) fields.
Empowers students and researchers with disabilities to conduct laboratory coursework and pursue scientific careers.