Water Immersion Lens
Water Immersion Lens - Related Videos
03:14
Eye Lens Dissection: A Technique to Observe Zebrafish Lens Morphology
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2023
This video describes the protocol which is developed to dissect adult and larval zebrafish lenses to analyze cortical lens morphology and structural integrity of the lens sutures.
05:14
Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher
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Cited by 9 •
2018
We present an efficient method of studying lens accommodation by using a manual lens stretcher. The protocol mimics physiological accommodation by pulling the zonules connected around the lens capsule, thereby, stretching the lens.
04:36
Vacuum-Sealed Hot Water Bath Immersion for the Preparation of Anatomical and Surgical Cadaveric Bone Models
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Cited by 1 •
2022
The present protocol describes the maceration and cleaning of cadaveric bone with a vacuum-sealed, hot water bath immersion technique. This is a low-cost, safe, and effective method to produce anatomical specimens for surgical planning and medical education as an alternative to three-dimensional (3D) printed models.
10:39
Lens Transplantation in Zebrafish and its Application in the Analysis of Eye Mutants
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Cited by 4 •
2009
Lens development involves interactions with other tissues. Several zebrafish eye mutants are characterized by an abnormally small lens size. Here we demonstrate a lens transplantation experiment to determine whether this phenotype is due to intrinsic causes or defective interactions with tissues that surround the lens.
11:30
Buoyancy and Drag on Immersed Bodies
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2023
Source: Alexander S Rattner and Sanjay Adhikari; Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA Objects, vehicles, and organisms immersed in fluid mediums experience forces from the surrounding fluid in the form of buoyancy- a vertical upward force due to fluid weight, drag- a resistive force opposite the direction of motion, and lift- a force perpendicular to the direction of motion. Prediction and characterization of these forces is...
FAQs
Water provides a refractive index closer to that of living tissue than air or oil. This closer optical match reduces refraction as light crosses between the objective, water, coverslip, and specimen, helping limit spherical aberration. The result is improved optical clarity for imaging aqueous neural preparations, particularly when fine cellular structures must be distinguished.
A high numerical aperture allows an objective to collect more light and support finer spatial detail. In neuroscience, that capability is valuable for resolving neurons, synapses, and other small features in brain tissue. When combined with the reduced interface aberration provided by water, high numerical aperture contributes to sharper, higher-resolution images.
The main distinction is the material forming the optical interface with the specimen. Water more closely matches the refractive index of living tissue than air or oil, making it well suited to aqueous biological samples. This compatibility can reduce refraction and spherical aberration while preserving the high numerical aperture needed for detailed neural imaging.
Water immersion primarily helps control refraction and spherical aberration at the boundary between the objective and the specimen. These effects can reduce optical clarity when the refractive indices differ substantially. By moderating them, the lens supports more reliable visualization of neural structures and activity in preparations where tissue and surrounding media remain aqueous.
The objective is used with water between its front lens and the specimen coverslip, creating the intended optical coupling for the observation. The preparation remains positioned beneath the coverslip while light passes through the water and tissue. This arrangement is appropriate for aqueous biological samples and supports the lens’s aberration-reducing design.
They are especially useful when researchers need high-resolution images from brain slices or living preparations. The design supports imaging of neurons, synapses, and neural activity while maintaining compatibility with aqueous tissue environments. Water immersion is also relevant to fluorescence and multiphoton microscopy, where optical clarity and reduced aberration directly support image acquisition.
For fluorescence microscopy, improved optical clarity helps capture labeled neural structures and activity-related signals with less distortion from the specimen interface. In multiphoton microscopy, the same water-based optical environment is valuable for imaging living or sliced brain tissue. Together, these properties make the lens useful when neural experiments require detailed optical readouts from aqueous preparations.
The principal outcome is clearer, higher-resolution visualization of structures and activity within aqueous neural samples. Depending on the experiment, this can include observing neurons, synapses, or neural activity in brain slices and living preparations. Reduced refraction and spherical aberration improve the optical conditions under which fluorescence or multiphoton images are collected.