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Refractive error change and vision improvement in moderate to severe hyperopic amblyopia after spectacle correction: Restarting the emmetropization process?

Abstract The aims of the study were to develop guidelines for prescribing spectacles for patients with moderate to severe hyperopic amblyopia and to demonstrate how emmetropization progresses.
PMID
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Authors

Mayor MeshTerms

Eyeglasses

Recovery of Function

Keywords
Journal Title plos one
Publication Year Start




PMID- 28423020
OWN - NLM
STAT- MEDLINE
DA  - 20170419
DCOM- 20170427
LR  - 20170427
IS  - 1932-6203 (Electronic)
IS  - 1932-6203 (Linking)
VI  - 12
IP  - 4
DP  - 2017
TI  - Refractive error change and vision improvement in moderate to severe hyperopic
      amblyopia after spectacle correction: Restarting the emmetropization process?
PG  - e0175780
LID - 10.1371/journal.pone.0175780 [doi]
AB  - PURPOSE: The aims of the study were to develop guidelines for prescribing
      spectacles for patients with moderate to severe hyperopic amblyopia and to
      demonstrate how emmetropization progresses. METHODS: Children with hyperopic
      amblyopia who had a spherical equivalent of >/= +4.0 diopters (D) or more were
      included, while those who had astigmatism of > 2.0 D or anisometropia of > 2.0 D 
      were excluded. The patients were divided into a full correction group and an
      under-correction group according to the amount of hyperopia correction applied.
      The under-correction group was further subdivided into a fixed under-correction
      group and a post-cycloplegic refraction (PCR) under-correction group. The
      duration of amblyopia treatment and changes in initial hyperopia were compared
      between the groups. RESULTS: In total, 76 eyes of 38 patients were analyzed in
      this study. The full correction group and under-correction group were subjected
      to 5.5 months and 5.9 months of amblyopia treatment, respectively (P = 0.570).
      However, the PCR under-correction group showed more rapid improvement (2.9
      months; P = 0.001). In the under-correction group, initial hyperopia was
      decreased by -0.28 D and -0.49 D at 6 months and 12 months, respectively, after
      initial cycloplegic refraction. Moreover, the amount of hyperopia
      under-correction was correlated with the amount of hyperopia reduction (P =
      0.010). CONCLUSION: The under-correction of moderate to severe hyperopic
      amblyopia has beneficial effects for treating amblyopia and activating
      emmetropization. PCR under-correction can more rapidly improve visual acuity,
      while both fixed under-correction and PCR under-correction can induce
      emmetropization and effectively reduce initial hyperopia.
FAU - Chang, Ji Woong
AU  - Chang JW
AD  - Department of Ophthalmology, Inje University Ilsan Paik Hospital, Inje University
      College of Medicine, Goyang, Korea.
AD  - Graduate Program in Cognitive Science, Yonsei University, Seoul, Korea.
LA  - eng
PT  - Journal Article
DEP - 20170419
PL  - United States
TA  - PLoS One
JT  - PloS one
JID - 101285081
SB  - IM
MH  - Amblyopia/classification/diagnosis/physiopathology/*therapy
MH  - Child
MH  - Child, Preschool
MH  - Emmetropia/*physiology
MH  - *Eyeglasses
MH  - Female
MH  - Humans
MH  - Hyperopia/classification/diagnosis/physiopathology/*therapy
MH  - Male
MH  - *Recovery of Function
MH  - Refraction, Ocular
MH  - Severity of Illness Index
MH  - Time Factors
MH  - Treatment Outcome
MH  - Visual Acuity/*physiology
EDAT- 2017/04/20 06:00
MHDA- 2017/04/28 06:00
CRDT- 2017/04/20 06:00
PHST- 2016/10/30 [received]
PHST- 2017/03/08 [accepted]
AID - 10.1371/journal.pone.0175780 [doi]
AID - PONE-D-16-43213 [pii]
PST - epublish
SO  - PLoS One. 2017 Apr 19;12(4):e0175780. doi: 10.1371/journal.pone.0175780.
      eCollection 2017.

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