ABSTRACT
@#AIM: To analyze the consistency and accuracy of the axial position of the astigmatism correction intraocular lens(Toric IOL)measured by OPD scan Ⅲ(optical path difference analyzer)and the traditional slit lamp method.<p>METHODS: A prospective observational control study. A total of 118 patients with 156 eyes who underwent phacoemulsification combined with Toric IOL implantation in our hospital from July 2018 to October 2019 were selected. The residual astigmatism was followed up at 1wk, 1mo and 3mo after the operation, and the axial position of Toric IOL was measured with OPD scan Ⅲ under the small pupil(Axial intraocular astigmatism method)and after dilated pupils(Axial OPD method), while using traditional slit lamp method to measure Toric IOL axis position(Axial Slit method). Analyze the difference and consistency of the measurement results of the three methods, and calculate the Lens axis deviation(LAD)between the measurement results of the three methods and the target axis. <p>RESULTS: The residual astigmatism of the patients in this group was significantly lower than that before the operation at 1wk, 1mo and 3mo after operation(<i>P</i><0.05). The proportion of residual astigmatism ≤ 0.75D at 3mo after surgery was 73.7%. Three months after the operation, the axial position of the Toric IOL measured by the axial Slit method, the axial OPD method, and the axial intraocular astigmatism method were: 111.0°(10, 178)°, 113.5°(12, 180)°, and 113.0°(15, 178)°. Consistency analysis showed that the average value of the difference between the axial OPD method and the axial Slit method, the axial intraocular astigmatism method and the axial slit method, the axial OPD method and the axial intraocular astigmatism method at 3mo after the operation, they were -0.58°, -0.19°, 0.40°, which were all close to 0°, with high consistency. 95% <i>LoA</i> were(-7.01-5.84)°,(-12.44-12.07)°,(-10.69-11.49)°. At 3mo postoperatively, the proportions of patients with LAD ≤5° measured by axial Slit method, axial OPD method, and axial intraocular astigmatism were 82.0%, 80.1%, and 59.0%, respectively.<p>CONCLUSION: OPD scan Ⅲ can directly measure Toric IOL axial position after dilated pupils. It was an objective and accurate measurement method, which can replace the traditional slit lamp method to measure axial position and avoid subjective limitations. The Toric IOL axial position can also be measured by intraocular astigmatism under the small pupil, which has certain practical application value in ophthalmology clinical work.
ABSTRACT
@#AIM: To observe the clinical efficacy and safety of regional refractive multifocal intraocular lens SBL-3. <p>METHODS: Eighty-five senile cataract patients(130 eyes)who underwent phacoemulsification and intraocular lens implantation in our hospital were divided into two groups according to the difference of implanted intraocular lens: patients with regional refractive multifocal intraocular lens(MIOL)42 example(65 eyes)as an observation group, 43 patients(65 eyes)of a single-focus aspheric intraocular lens were used as a control group. Three months after operation, the indicators were: uncorrected distance visual acuity(UCDVA), uncorrected intermediate visual acuity(UCIVA), uncorrected near visual acuity(UCNVA), and spherical equivalent power(SE). The naked eye defocus curve was measured and the patient's subjective visual quality was investigated by questionnaire, including the rate glasses removal, visual interference symptoms and satisfaction. <p>RESULTS: At 3mo after operation, UCDVA was significantly improved in both groups compared with preoperative, and the difference was statistically significant(<i>P</i><0.01). However, there was no significant difference between the two groups(<i>P</i>>0.05), while UCIVA and UCNVA in the observation group were significantly better than the control group, the difference was statistically significant(<i>P</i><0.01). At 3mo after operation, the difference of computerized optometry spherical equivalent power(SE)of the two groups was statistically significant(<i>P</i><0.01). At 3mo after operation, the naked eye defocus curve of the observation group was stable in the range of +0.50 to -3.00D, the LogMAR visual acuity was below 0.301, and the curve began to rise slowly after -3.50D; the control group showed trough between ±0.5D, both ends are rising rapidly. At 3mo postoperatively, the proportion of patients with visual interference symptoms in the observation group(4/42)was not significantly different from that in the control group(2/43)(<i>P</i>=0.433). The glasses removal rate of the observation group was 97.6%(41/42), control group was 18.6%(8/43), the difference was statistically significant(<i>χ</i><sup>2</sup>=4.318, <i>P</i>=0.038). In the observation group, the single eye distance satisfaction was 92.3%, and the control group was 93.8%. The difference was not statistically significant(<i>P</i>=1.000). The observation group had a single eye near fullness of 98.5%(64/65)and the control group was 16.9%(11/65), the difference was statistically significant(<i>χ</i><sup>2</sup>=88.526, <i>P</i><0.01). <p>CONCLUSION: The regional refraction MIOL can provide good near-intermediate-distance and full-distance uncorrected visual acuity. It can meet the needs of the patients at daily, distance-middle distance-near use. Postoperative visual interference symptoms were fewer and patient satisfaction was higher.