Rat Models of Glaucoma in the MICRON Literature

About the MICRON Research Literature

These research pages organize published studies using MICRON imaging systems by animal species and the disease or condition investigated.

All publication counts and figures reflect the complete indexed research collection.

Explore related studies through the MICRON Research Hubs or search the complete publication collection in the reSEARCH portal.

Understanding Glaucoma

Glaucoma is a progressive optic neuropathy in which retinal ganglion cells and their axons are lost and the optic nerve head remodels as those axons disappear, producing a pattern of visual-field loss that is a principal functional endpoint in people.

Intraocular pressure is the risk factor that can be modified, and lowering it is the intervention established in clinical practice. Pressure is a risk factor rather than the definition of the disease, and clinical classification turns on the optic nerve:

• An eye with raised pressure whose optic nerve is not yet damaged is classified clinically as ocular hypertension rather than as glaucoma
• Ganglion cell loss of the same character occurs at pressures within the statistically normal range, which is what normal-tension glaucoma names

Those are distinctions between clinical states of an eye, and one paper can describe several of them.

Glaucoma in Experimental Research

Raising intraocular pressure is how much of this literature induces the condition experimentally.

What an animal supplies is an optic nerve available for histology at a defined stage of injury, a pressure history that can be measured and, in induced models, manipulated experimentally, and a time course compressed relative to human disease.

What differs is the structure the axons pass through on their way out of the eye, and the retina they come from:

• Macaques have a collagenous lamina cribrosa close to the human arrangement and a macula
• Mice and rats have a glial lamina, so nerve head biomechanics are approximated in a rodent eye rather than reproduced
• Mice and rats lack a macula, so the macular ganglion-cell architecture and central-field consequences of human glaucoma have no exact rodent counterpart

Rat Models of Glaucoma

The rat offers a larger eye than the mouse while remaining a small-animal model, which eases injection and imaging without moving to a large species.

Published MICRON Research: Glaucoma in Rats

This page lists 7 papers from the MICRON literature, published 2015 to 2026, that study glaucoma in rats.

Of these publications:

• 7 studies used rats as the primary glaucoma disease model.

Scope of the literature collection: Publication counts reflect studies identified and indexed in the MICRON research corpus. This collection is not intended to represent an exhaustive review of all published glaucoma research.

Which imaging and experimental techniques are used in these studies?

Technique counts are paper-level co-occurrences and do not necessarily indicate that a technique was applied to the focal species or focal disease model.

Capabilities and Limitations of Imaging Techniques

A summary of what each imaging technique listed above can measure, the information it provides, and its limitations in research applications.

Electroretinography

Records the retina's electrical response to light, giving component-sensitive information about outer- and inner-retinal function. It measures function directly, which no structural method does. Full-field ERG sums across the whole retina, so a small lesion can leave the trace unchanged; focal and multifocal variants trade signal amplitude for spatial resolution.

Optical Coherence Tomography

Optical coherence tomography provides high-resolution, cross-sectional images of ocular tissues in the living eye, allowing researchers to visualize structures at different depths. OCT is particularly useful for measuring tissue thickness, identifying structural abnormalities, and assessing the location and extent of tissue changes.

As a non-invasive imaging technique, OCT enables repeated measurements in the same eye over time, supporting longitudinal studies of disease progression and treatment response. Although OCT provides detailed structural information, it does not directly measure cellular activity or visual function. Tissue that appears structurally normal may still have functional abnormalities, making OCT a valuable companion to functional assessments such as electroretinography (ERG).

Intravitreal Injection / Delivery

Injection into the vitreous places a substance directly into the vitreous at a known administered dose and chosen time, reducing but not eliminating systemic exposure. The injectate may be a therapeutic compound, cell preparation or viral vector, or an agent used to create the model, such as a toxin, vasoactive or excitotoxic compound, or infectious inoculum. The route bypasses surface-delivery barriers and provides direct access to the vitreous and posterior segment, but the concentration reached in a particular ocular tissue depends on distribution and clearance and is not fixed by the injected dose alone. It is invasive and discrete: each repeat dose or challenge requires another injection, and vehicle- or sham-injected controls can help separate effects of the injectate from effects of the procedure.

Topical Ophthalmic Drug Delivery

A compound applied as drops to the ocular surface. It is non-invasive and repeatable, so it supports frequent dosing without a procedure for each dose. What the route has to establish depends on the target: for an ocular-surface target, residence time and penetration into the surface tissue are the main barriers; for an intraocular anterior-segment target, the compound must cross ocular-surface and corneal or conjunctival barriers and reach an intraocular concentration sufficient for the experiment; for a posterior-segment target, additional ocular barriers separate the surface from the target and posterior-segment exposure is harder to establish.

Which MICRON systems and add-ons appear?

Which strains and genetic lines are used?

Which other species appear alongside?

What other conditions are recorded on the same papers?

The general term records an accepted mention of glaucoma without a subtype qualifier. It is not a roll-up: a paper carrying a subtype may or may not also carry the general term, depending on whether an unqualified mention of the family is also recorded elsewhere in the paper.

Which MICRON configurations appear in this work?

Configurations recorded in these papers, and the techniques recorded alongside them.

The papers

Browse all hubs at MICRON Research Hubs. The full corpus is searchable in the reSEARCH portal.