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Optic Disc Change during Childhood Myopic Shift: Comparison between Eyes with an Enlarged Cup-To-Disc Ratio and Childhood Glaucoma Compared to Normal Myopic Eyes.

Park HY, Kim SE, Park CK - PLoS ONE (2015)

Bottom Line: The initial intraocular pressure (IOP) at diagnosis was significantly different among the groups (P<0.001).However, the changes in the HDD/VDD and PPW/VDD ratios were significantly greater in the disc suspect group and significantly smaller in the glaucoma group.Eyes of childhood glaucoma showed less change in the disc morphology during myopic shift compared to eyes with normal disc or enlarged cup-to-disc ratio.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology and Visual Science, College of Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea.

ABSTRACT

Background: Progressive disc tilting and the development or enlargement of peripapillary atrophy (PPA) are observed during a myopic shift in children. This could be related to the changes around the optic nerve head during eyeball elongation. If the biomechanical properties at or around the optic nerve head are changed after exposure to elevated intraocular pressure (IOP) in glaucoma eyes, different response of the disc tilting and PPA changes could take place during eyeball elongation by myopic shift. On the basis of this background, the aim of this study was to compare the morphological changes in the optic disc induced by a myopic shift during childhood between normal control eyes, eyes from disc suspects with an enlarged cup-to-disc ratio (CDR), and eyes with childhood glaucoma.

Methods: Total of 82 eyes from 82 subjects younger than 14 years of age were included in the study. Serial disc photographs were classified into one of two groups: eyes with an optic nerve head (ONH) or peripapillary atrophy (PPA) change or without an ONH/PPA change. Using ImageJ software, the outlines of the optic disc and PPA were plotted, and the vertical disc diameter (VDD), horizontal disc diameter (HDD), and maximum PPA width (PPW) were measured. The changes in the ratios of these parameters and the relationships between the degree of myopic shift or the ONH/PPA change were analyzed.

Results: Twenty-five eyes with normal optic disc appearance, 36 eyes with enlarged cup-to-disc ratio, and 21 eyes of glaucoma patients were analyzed. The initial intraocular pressure (IOP) at diagnosis was significantly different among the groups (P<0.001). The degree of myopic shift during follow-up period was not significantly different among the groups (P=0.612). However, the changes in the HDD/VDD and PPW/VDD ratios were significantly greater in the disc suspect group and significantly smaller in the glaucoma group. Among the 42 eyes with an ONH/PPA change, 16 (38.1%) were from the normal control group, 24 (57.1%) were from the disc suspect group, and 2 (4.8%) were from the glaucoma group (P < 0.001).

Conclusions and relevance: The optic disc change during childhood myopic shift was different in eyes with various conditions. Eyes of childhood glaucoma showed less change in the disc morphology during myopic shift compared to eyes with normal disc or enlarged cup-to-disc ratio.

No MeSH data available.


Related in: MedlinePlus

The relationship between the degree of myopic shift and the changes in optic disc morphology.The horizontal disc diameter to vertical disc diameter ratio (upper panel) and the peripapillary atrophy width to vertical disc diameter ratio (lower panel) significantly changed according to the degree of myopic shift in the disc suspect eyes with an enlarged cup-to-disc ratio. The eyes with glaucoma had minimal changes in the two parameter ratios despite the myopic shift.
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pone.0131781.g001: The relationship between the degree of myopic shift and the changes in optic disc morphology.The horizontal disc diameter to vertical disc diameter ratio (upper panel) and the peripapillary atrophy width to vertical disc diameter ratio (lower panel) significantly changed according to the degree of myopic shift in the disc suspect eyes with an enlarged cup-to-disc ratio. The eyes with glaucoma had minimal changes in the two parameter ratios despite the myopic shift.

Mentions: The change in the HDD/VDD (r = -0.450, P = 0.006) or the PPW/VDD (r = -0.446, P = 0.006) ratios significantly correlated with the degree of the SE change only in the disc suspect group (Fig 1).


Optic Disc Change during Childhood Myopic Shift: Comparison between Eyes with an Enlarged Cup-To-Disc Ratio and Childhood Glaucoma Compared to Normal Myopic Eyes.

Park HY, Kim SE, Park CK - PLoS ONE (2015)

The relationship between the degree of myopic shift and the changes in optic disc morphology.The horizontal disc diameter to vertical disc diameter ratio (upper panel) and the peripapillary atrophy width to vertical disc diameter ratio (lower panel) significantly changed according to the degree of myopic shift in the disc suspect eyes with an enlarged cup-to-disc ratio. The eyes with glaucoma had minimal changes in the two parameter ratios despite the myopic shift.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493000&req=5

pone.0131781.g001: The relationship between the degree of myopic shift and the changes in optic disc morphology.The horizontal disc diameter to vertical disc diameter ratio (upper panel) and the peripapillary atrophy width to vertical disc diameter ratio (lower panel) significantly changed according to the degree of myopic shift in the disc suspect eyes with an enlarged cup-to-disc ratio. The eyes with glaucoma had minimal changes in the two parameter ratios despite the myopic shift.
Mentions: The change in the HDD/VDD (r = -0.450, P = 0.006) or the PPW/VDD (r = -0.446, P = 0.006) ratios significantly correlated with the degree of the SE change only in the disc suspect group (Fig 1).

Bottom Line: The initial intraocular pressure (IOP) at diagnosis was significantly different among the groups (P<0.001).However, the changes in the HDD/VDD and PPW/VDD ratios were significantly greater in the disc suspect group and significantly smaller in the glaucoma group.Eyes of childhood glaucoma showed less change in the disc morphology during myopic shift compared to eyes with normal disc or enlarged cup-to-disc ratio.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology and Visual Science, College of Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea.

ABSTRACT

Background: Progressive disc tilting and the development or enlargement of peripapillary atrophy (PPA) are observed during a myopic shift in children. This could be related to the changes around the optic nerve head during eyeball elongation. If the biomechanical properties at or around the optic nerve head are changed after exposure to elevated intraocular pressure (IOP) in glaucoma eyes, different response of the disc tilting and PPA changes could take place during eyeball elongation by myopic shift. On the basis of this background, the aim of this study was to compare the morphological changes in the optic disc induced by a myopic shift during childhood between normal control eyes, eyes from disc suspects with an enlarged cup-to-disc ratio (CDR), and eyes with childhood glaucoma.

Methods: Total of 82 eyes from 82 subjects younger than 14 years of age were included in the study. Serial disc photographs were classified into one of two groups: eyes with an optic nerve head (ONH) or peripapillary atrophy (PPA) change or without an ONH/PPA change. Using ImageJ software, the outlines of the optic disc and PPA were plotted, and the vertical disc diameter (VDD), horizontal disc diameter (HDD), and maximum PPA width (PPW) were measured. The changes in the ratios of these parameters and the relationships between the degree of myopic shift or the ONH/PPA change were analyzed.

Results: Twenty-five eyes with normal optic disc appearance, 36 eyes with enlarged cup-to-disc ratio, and 21 eyes of glaucoma patients were analyzed. The initial intraocular pressure (IOP) at diagnosis was significantly different among the groups (P<0.001). The degree of myopic shift during follow-up period was not significantly different among the groups (P=0.612). However, the changes in the HDD/VDD and PPW/VDD ratios were significantly greater in the disc suspect group and significantly smaller in the glaucoma group. Among the 42 eyes with an ONH/PPA change, 16 (38.1%) were from the normal control group, 24 (57.1%) were from the disc suspect group, and 2 (4.8%) were from the glaucoma group (P < 0.001).

Conclusions and relevance: The optic disc change during childhood myopic shift was different in eyes with various conditions. Eyes of childhood glaucoma showed less change in the disc morphology during myopic shift compared to eyes with normal disc or enlarged cup-to-disc ratio.

No MeSH data available.


Related in: MedlinePlus