Evidence map›Paper›PMID 25799136›Full record

ArticleChronobiology international2015

Circadian rhythm of intraocular pressure in the adult rat.

Diana C Lozano, Andrew T E Hartwick, Michael D Twa

Open access · greenAbstract read
In one paragraph

Article in Chronobiology international, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.0field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 32 citations in OpenAlex.

  1. Article
  2. Article
  3. Circadian IOP Rhythm in Rats Is Driven by Neural Signals From the Brain.Investigative ophthalmology & visual science · 2026
    Article
  4. Review
  5. Effect of Ambient Lighting on Intraocular Pressure Rhythms in Rats.Investigative ophthalmology & visual science · 2024
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Ocular and Systemic Diurnal Rhythms in Emmetropic and Myopic Adults.Investigative ophthalmology & visual science · 2019
    Article
  16. Ocular Biometric Diurnal Rhythms in Emmetropic and Myopic Adults.Investigative ophthalmology & visual science · 2018
    Article
  17. Ocular Clocks: Adapting Mechanisms for Eye Functions and Health.Investigative ophthalmology & visual science · 2018
    Review
  18. Article
  19. MicroRNA Expression in the Glaucomatous Retina.Investigative ophthalmology & visual science · 2015
    Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 1 country.

Diana C LozanoCollege of Optometry, University of Houston , Houston, TX , USA and.
Andrew T E Hartwick
Michael D Twa
University of Houston · USThe Ohio State University · US

Funding

Research Programming ModuleP30EY007551 · NEI · UNIVERSITY OF HOUSTON · PI VALLABH E DAS · 1988 to 2026
$16.4M
Optical Coherence Elastography of the CorneaR01EY022362 · NEI · UNIVERSITY OF HOUSTON · PI Salavat R Aglyamov, Kirill V Larin · 2012 to 2026
$6.7M
NEI NIH HHS P30 EY007551NEI NIH HHS P30 EY07551NEI NIH HHS R01 EY022362
6 · The paper itself

Abstract

Ocular hypertension is a risk factor for developing glaucoma, which consists of a group of optic neuropathies characterized by progressive degeneration of retinal ganglion cells and subsequent irreversible vision loss. Our understanding of how intraocular pressure damages the optic nerve is based on clinical measures of intraocular pressure that only gives a partial view of the dynamic pressure load inside the eye. Intraocular pressure varies over the course of the day and the oscillator regulating these daily changes has not yet been conclusively identified. The purpose of this study was to compare and contrast the circadian rhythms of intraocular pressure and body temperature in Brown Norway rats when these animals are housed in standard light-dark and continuous dim light (40-90 lux) conditions. The results from this study show that the temperature rhythm measured in continuous dim light drifted forward relative to external time, indicating that the rhythm was free running and being regulated by an internal biological clock. Also, the results show that there is a persistent, but dampened, circadian rhythm of intraocular pressure in continuous dim light and that the circadian rhythms of temperature and intraocular pressure are not synchronized by the same central oscillator. We conclude that once- or twice-daily clinical measures of intraocular pressure are insufficient to describe intraocular pressure dynamics. Similarly, our results indicate that, in experimental animal models of glaucoma, the common practice of housing animals in constant light does not necessarily eliminate the potential influence of intraocular pressure rhythms on the progression of nerve damage. Future studies should aim to determine whether an oscillator within the eye regulates the rhythm of intraocular pressure and to better characterize the impact of glaucoma on this rhythm.

Indexed as

Ocular Physiological PhenomenaAgingAnimalsBody TemperatureCircadian RhythmIntraocular PressureLightMaleModels, AnimalRatsRetinal Ganglion CellsRisk FactorsCircadiancore body temperatureintraocular pressurerodenttelemetry

Identifiers

PMID25799136
PMCPMC4607472
OpenAlexW2143967065

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.