A Hospital-Based Study to Investigate Fluctuation of Intraocular Pressure (IOP) and Seasonal Variation of 24-Hour IOP
Creators
- 1. PG 3rd year resident, Department of Ophthalmology, DMCH, Darbhanga, Bihar, India
Description
Aim: The aim of the present study was to investigate fluctuation of intraocular pressure (IOP) and seasonal variation of 24-hour IOP. Methods: The present study conducted in the Department of Ophthalmology, DMCH Darbhanga, Bihar, India for one year and twenty healthy volunteers (10 females and 10 males) were recruited. Each subject received a comprehensive ophthalmic examination including slit-lamp and ophthalmoscopy examination, and no participant demonstrated any signs of ophthalmic and/or systemic diseases or had a family history of glaucoma. Results: The yearly fluctuation curve showed IOP in the summer months were lower than other seasons. This survey began in December and lasted until January. The lowest IOP was obtained during summer and the deviation between the lowest and highest IOP was an average of 0.4-0.5 mm Hg. Both eyes fitting curves yearly showed IOP fluctuation. It demonstrates that the winter months IOP are higher than those in the spring, summer and autumn months. There was no significant relationship with other individual/environmental confounding factors. When evaluating temperature, IOP was significantly lower on hotter days (β=-0.9, P=0.012, temperature >24°C). The calculated β-value is rising with increasing of the sunshine duration, it gets to -0.5 when day length is above 48242.0s (about 13.5h). Moreover, the trend tests show statistically significant findings in temperature and sunshine duration. Conclusion: IOP is trend to be higher in cold days than warm days. IOP have negative association with both environmental temperature and duration of sunshine. On a season-to-season basis, 24-hour IOP is not highly reproducible in healthy volunteers.
Abstract (English)
Aim: The aim of the present study was to investigate fluctuation of intraocular pressure (IOP) and seasonal variation of 24-hour IOP. Methods: The present study conducted in the Department of Ophthalmology, DMCH Darbhanga, Bihar, India for one year and twenty healthy volunteers (10 females and 10 males) were recruited. Each subject received a comprehensive ophthalmic examination including slit-lamp and ophthalmoscopy examination, and no participant demonstrated any signs of ophthalmic and/or systemic diseases or had a family history of glaucoma. Results: The yearly fluctuation curve showed IOP in the summer months were lower than other seasons. This survey began in December and lasted until January. The lowest IOP was obtained during summer and the deviation between the lowest and highest IOP was an average of 0.4-0.5 mm Hg. Both eyes fitting curves yearly showed IOP fluctuation. It demonstrates that the winter months IOP are higher than those in the spring, summer and autumn months. There was no significant relationship with other individual/environmental confounding factors. When evaluating temperature, IOP was significantly lower on hotter days (β=-0.9, P=0.012, temperature >24°C). The calculated β-value is rising with increasing of the sunshine duration, it gets to -0.5 when day length is above 48242.0s (about 13.5h). Moreover, the trend tests show statistically significant findings in temperature and sunshine duration. Conclusion: IOP is trend to be higher in cold days than warm days. IOP have negative association with both environmental temperature and duration of sunshine. On a season-to-season basis, 24-hour IOP is not highly reproducible in healthy volunteers.
Files
IJPCR,Vol15,Issue3,Article118.pdf
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Additional details
Dates
- Accepted
-
2023-03-06
Software
- Repository URL
- https://impactfactor.org/PDF/IJPCR/15/IJPCR,Vol15,Issue3,Article118.pdf
- Development Status
- Active
References
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