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Evaluation of the Lower Punctum Parameters and Morphology Using Spectral Domain Anterior Segment Optical Coherence Tomography.
J Ophthalmol 2015; 2015:591845JO

Abstract

Purpose.

To study features of the lower punctum in normal subjects using spectral domain anterior segment optical coherence tomography (SD AS-OCT). Methods. Observational cross-sectional study that included 147 punctae (76 subjects). Punctae were evaluated clinically for appearance, position, and size. AS-OCT was used to evaluate the punctal shape, contents, and junction with the vertical canaliculus. Inner and outer diameters as well as depth were measured.

Results.

24 males and 52 females (mean age 44 ± 14.35 y) were included. Lower punctum was perceived by OCT to be an area with an outer diameter (mean 412.16 ± 163 μm), inner diameter (mean 233.67 ± 138.73 μm), and depth (mean 251.7 ± 126.58 μm). The OCT measured outer punctum diameter was significantly less than that measured clinically (P: 0.000). Seven major shapes were identified. The junction with the vertical canaliculus was detectable in 44%. Fluid was detected in 34%, one of which had an air bubble; however, 63% of punctae showed no contents and 4% had debris.

Conclusions.

AS-OCT can be a useful tool in understanding the anatomy of the punctum and distal lacrimal system as well as tear drainage physiology. Measuring the punctum size may play a role in plugs fitting.

Authors+Show Affiliations

Ophthalmology Department, Kasr El Aini School of Medicine, Cairo University, Cairo, Egypt.Ophthalmology Department, Kasr El Aini School of Medicine, Cairo University, Cairo, Egypt.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26090219

Citation

Allam, Riham S H M., and Rania A. Ahmed. "Evaluation of the Lower Punctum Parameters and Morphology Using Spectral Domain Anterior Segment Optical Coherence Tomography." Journal of Ophthalmology, vol. 2015, 2015, p. 591845.
Allam RS, Ahmed RA. Evaluation of the Lower Punctum Parameters and Morphology Using Spectral Domain Anterior Segment Optical Coherence Tomography. J Ophthalmol. 2015;2015:591845.
Allam, R. S., & Ahmed, R. A. (2015). Evaluation of the Lower Punctum Parameters and Morphology Using Spectral Domain Anterior Segment Optical Coherence Tomography. Journal of Ophthalmology, 2015, p. 591845. doi:10.1155/2015/591845.
Allam RS, Ahmed RA. Evaluation of the Lower Punctum Parameters and Morphology Using Spectral Domain Anterior Segment Optical Coherence Tomography. J Ophthalmol. 2015;2015:591845. PubMed PMID: 26090219.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of the Lower Punctum Parameters and Morphology Using Spectral Domain Anterior Segment Optical Coherence Tomography. AU - Allam,Riham S H M, AU - Ahmed,Rania A, Y1 - 2015/05/21/ PY - 2015/02/11/received PY - 2015/04/13/revised PY - 2015/04/20/accepted PY - 2015/6/20/entrez PY - 2015/6/20/pubmed PY - 2015/6/20/medline SP - 591845 EP - 591845 JF - Journal of ophthalmology JO - J Ophthalmol VL - 2015 N2 - Purpose. To study features of the lower punctum in normal subjects using spectral domain anterior segment optical coherence tomography (SD AS-OCT). Methods. Observational cross-sectional study that included 147 punctae (76 subjects). Punctae were evaluated clinically for appearance, position, and size. AS-OCT was used to evaluate the punctal shape, contents, and junction with the vertical canaliculus. Inner and outer diameters as well as depth were measured. Results. 24 males and 52 females (mean age 44 ± 14.35 y) were included. Lower punctum was perceived by OCT to be an area with an outer diameter (mean 412.16 ± 163 μm), inner diameter (mean 233.67 ± 138.73 μm), and depth (mean 251.7 ± 126.58 μm). The OCT measured outer punctum diameter was significantly less than that measured clinically (P: 0.000). Seven major shapes were identified. The junction with the vertical canaliculus was detectable in 44%. Fluid was detected in 34%, one of which had an air bubble; however, 63% of punctae showed no contents and 4% had debris. Conclusions. AS-OCT can be a useful tool in understanding the anatomy of the punctum and distal lacrimal system as well as tear drainage physiology. Measuring the punctum size may play a role in plugs fitting. SN - 2090-004X UR - https://www.unboundmedicine.com/medline/citation/26090219/Evaluation_of_the_Lower_Punctum_Parameters_and_Morphology_Using_Spectral_Domain_Anterior_Segment_Optical_Coherence_Tomography_ L2 - https://dx.doi.org/10.1155/2015/591845 DB - PRIME DP - Unbound Medicine ER -