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Volume 2, Issue 2 (Suppl)

Optom open access

ISSN: 2476-2075 OMOA, an open access journal

Ophthalmologists 2017

September 25-26, 2017

September 25-26, 2017 Dubai, UAE

11

th

Global

Ophthalmologists Annual Meeting

The association between relative peripheral refraction and myopia

Lianhong Zhou

Renmin Hospital of Wuhan University, China

Objective:

To evaluate the relation between relative peripheral refraction and myopia by studying the characteristics of retinal

peripheral relative refraction in children with emmetropia, low myopia or moderate myopia.

Method:

90 children (with 165 eyes included) at the age of 7-12 years old, who have attended to Pediatric Ophthalmology

Clinic, RenminHospital of WuhanUniversity in September 2016 to February 2017 were included in the study. Axial dimensions

and peripheral refraction are measured. The 90 subjects with 165 eyes included were divided into three refractive categories

according to the spherical equivalent based on objective retinoscopic findings under cycloplegia: Emmetropia group (>-0.5

and ≤+0.50 D, n=27), low myopia group (>-3.00 D and ≤-0.50 D, n=112) and moderate myopia group (>-6.00 D and ≤-3.00

D, n=26). Peripheral refractions were measured in uncorrected state along 15 degrees and 30 degrees from central fixation in

both nasal and temporal fields. The relative peripheral refraction (RPRE) is described as the difference between peripheral

refraction and central refraction.

Results:

There is significant difference in RPRE among the three refraction groups, the RPRE is increased from emmetropia,

low myopia to moderate myopia (p<0.05). As changing of fixation angles, it decreases progressively from temporal 30 degrees,

nasal 30 degrees to temporal 15 degrees and nasal 15 degrees (p<0.05). The RPRE shows relative hyperopia in low and moderate

myopia, which is greater at the surrounding retina than macular center (p<0.05) and is greater at the temporal fixating angles

than nasal’s (p>0.05). The axial length is negatively relative with spherical equivalent refraction (r=-0.564, p=0.001) and is

positively relative with RPRE, which is more strongly to the temporal fixation angles, as the correlation coefficient in T30 °s’,

T15 °s’, N15 °s’ and N30 °s’ RPRE are r=0.347, p=0.001; r=0.341, p=0.001; r=0.199, p=0.004; and r=0.199, p=0.001, respectively.

Conclusions:

Peripheral retinal relative refraction status shows relatively hyperopic that increases vary from emmetropia,

low myopia to moderate myopia. Occurrence and progress of myopia may have intimate connection with total field retinal

hyperopic defocus, but it plays a greater role in the temporal retina.

Biography

Lianhong Zhou has completed her PhD from Wuhan University. She is the Professor, Tutor at Renmin Hospital of Wuhan University or People’s Hospital of Wuhan

University. She has published more than 85 papers in reputed journals so far.

zlh681102@aliyun.com

Lianhong Zhou, Optom open access 2017, 2:2 (Suppl)

DOI: 10.4172/2476-2075-C1-005