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Kim, Jeong, Ha, Lee, and Kim: Relationship Between the Ocular Surface Temperature and the Nasal Predominance in Pterygium
Original Article

J Korean Ophthalmol Soc 2008;49(5):732-736.

Published online: 7 September 2008

DOI: https://doi.org/10.3341/jkos.2008.49.5.732

Relationship Between the Ocular Surface Temperature and the Nasal Predominance in Pterygium

Jae Hoon Kim, M.D., Jae Hoon Jeong, M.D., Hyo Shin Ha, M.D., Hyeon Il Lee, M.D., Jae Chan Kim, M.D., Ph.D

Department of Ophthalmology, Chung-Ang University College of Medicine, Seoul, Korea

Address reprint requests to Jae Chan Kim, M.D., Ph.D Department of Ophthalmology, College of Medicine, Chung-Ang University Yongsan Hospital #65-207 Hangangro 3-Ga, Yongsan-gu, Seoul 140-757, Korea Tel: 82-2-748-9838, Fax: 82-2-6381-9838, E-mail: jck50ey@kornet.net

Received 7 March 2007       Accepted 27 November 2007

Copyright © 2008 Korean Ophthalmological Society

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To study the relationship between the distribution of the ocular surface temperature and the nasal predominance in pterygium.

Methods

In order to identify the distribution of the ocular surface, the surface temperature was measured at four points on the eyelids and on the bulbar conjunctiva with a non-contact thermometer. The ocular surface temperature in the pterygium patient group was compared with that in a normal control group. The temperature difference at each point on the ocular surface was also examined.

Results

In both of the patient and the normal groups, the surface temperature on the eyelid was at its lowest on the temporal lower eyelid, and highest on the nasal upper eyelid. On the bulbar conjunctiva, the surface temperature of the nasal conjunctiva was at its lowest, and at its highest on the upper conjunctiva. The most distinctive temperature difference between the patient and control groups was shown on the nasal and temporal bulbar conjunctivas, and statistically significant (p<0.05).

Conclusions

Considering the temperature distribution over the ocular surface, we propose that an intrinsic factor that causes the nasal predominance of pterygium could be the comparatively low local temperature of the nasal bulbar conjunctiva.

Keywords: Nasal predominance, Ocular surface temperature, Pterygium

References

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Figure 1.
Non-contact infra-red thermometer.
jkos-49-732f1.tif
Figure 2.
Result of ocular surface temperature (°C); NUL = nasal upper lid; TUL = temporal upper lid; NLL = nasal lower lid; TLL = temporal lower lid; SC = superior bulbar conjunctiva; IC = inferior bulbar conjunctiva; TC = temporal bulbar conjunctiva; NC = nasal bulbar conjunctiva.
jkos-49-732f2.tif
Table 1.
Clinic group al characteristics of p pterygium and control
  Pterygium group Control group
N (Eyes) 14 (14) 126 (252)
Mean Age 63.29±11.25 61.39±13.55
Sex (M/F) 9/5 (1/0.56) 79/47 (1/0.59)
Side (OD/OS) 8/6 (1/0.75) 126/126 (1/ 1)
Table 2.
Ocular surface temperature (°C) and difference between the pterygium and control groups
  Pterygium group (Mean±SD)∗ Control group (Mean±SD)∗ P value†
Nasal Upper Lid 33.04±0.52 33.13±0.51 0.52
Temporal Upper Lid 32.49±0.85 32.44±0.83 0.95
Nasal Lower Lid 32.54±0.82 32.60±1.22 0.44
Temporal Lower Lid 31.70±1.23 31.63±1.32 0.73
Superior Bulbar Conjunctiva 32.70±0.93 32.80±0.75 0.61
Inferior Bulbar Conjunctiva 32.27±1.00 32.55±0.88 0.29
Temporal Bulbar Conjunctiva 32.15±0.78 32.72±0.78 0.01
Nasal Bulbar Conjunctiva 31.82±0.86 32.44±0.98 0.01

∗ Standard deviation;

† Mann-Whitney U test.

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