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Jin Yuan, zhong jing, Zhong-Lin Lu, Fang Hou, Michael Dorr, Zhipeng Chen, Shenglan Zhang, Jinrong Li; The Visual Quality and its Related Life Quality of Pterygium. Invest. Ophthalmol. Vis. Sci. 2019;60(9):4469. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To assess the visual quality including the optical quality and contrast sensitivity function(CSF) of pterygium patients, as well as the prognosis postoperatively
31 pterygium patients at different levels ( 14 cases of Grade I, 13 Grade II and 8 Grade III; mean age: 47.8±9.2 yrs) were included in this study. All patients underwent a routine ophthalmic examination, quick CSF tests under full optical correction, the Optical Quality Analysis System (OQAS) test, the oculus keratography 5M (K5) and filled out the VFQ-25 visual quality questionnaire preoperatively. After surgery, the visual quality was followed at the 1st, 3rd and 6th month
The degree of astigmatism increased gradually with the severity of the pterygium, which were -0.30±0.07DS in Grade I, -2.68±0.59 D (P=0.0021) in Grade II and -6.25±1.06(P =0.0059) in Grade III; accordingly, the mean NEI VFQ-25 scores decreased from 73.0±2.0 in Grade I to 64.6±2.0(P=0.07) in Grade II and 55.0±2.9 (P= 0.03) in Grade III. In the K5 test, the bulbar nasal and limbal nasal redness scale increased gradually following the pterygium grade while not the bulbar nasal and limbal nasal, and the nasal side’s redness scale correlated with the degree of astigmatism positively (r = -0.467, P = 0.0071). In the optical quality, the MTF cutoff was the lowest in the Grade III compared with Grade II and I (14.74±3.94 VS 31.99±2.81 VS 40.41±1.89 ; P<0.001). Both the MTFcutoff and the SR correlated positively with the astigmatism degree (r = -3.34, P = 0.0025; r = -0.40, P = 0.0008). In CSF, the cutoff SF was obviously damaged in Grade II (14.79±1.28 cpd, P = 0.048) and III (12.79±1.28 cpd, P = 0.026) patients compared with the normal’s (17.21±1.24 cpd), while not of the Grade I (12.79±1.28 cpd, P = 0.577). The AULCSF of Grade II (1.08 ± 0.29, P = 0.026) and III group (0.83 ± 0.32) was significantly lower than that of the normal group (1.21 ± 0.05 , P = 0.023). Postoperatively, the degree of astigmatism, the NEI VFQ-25, and the contrast sensitivity showed obvious improvement since the 1st month.
The optical quality and contrast sensitivity were damaged in Grade II and III pterygium patients, which correlated with the severity of pterygium and its induced astigmatism. Patients following surgery exhibited obvious improvement of visual quality since the 1st month, which provided a good reference clinically.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.
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