Optical biometry-based axial length alterations after intravitreal dexamethasone
            implant

Özal, Sadık Altan; Kupelı, Ayca; Özal, Ece; Gürlü, Vuslat

doi:10.5935/0004-2749.20190040

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…This information would help us to better analyze the association between the vitreous volume or pressure and anterior chamber anatomy. A previous study demonstrated that axial length was increased after intravitreal dexamethasone implant, 18 while other subsequent studies reported that there was no correlation between axial length and IOP elevation or ACD after intravitreal injection. 9,19,20…”

Section: Discussionmentioning

confidence: 96%

Anterior chamber changes assessment by Scheimpflug analysis after intravitreal dexamethasone implantation

Kucukkomurcu

Şahı̇n

2021

European Journal of Ophthalmology

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Purpose: To evaluate structural changes in the anterior chamber and intraocular pressure (IOP) changes following intravitreal dexamethasone implantation. Methods: Forty-two eyes of 42 patients that received intravitreal dexamethasone implant for the management of macular edema secondary to diabetic retinopathy or branch retinal vein occlusion (BRVO) were included in the study. IOP was measured by Goldmann applanation tonometry. Anterior chamber depth (ACD) and iridocorneal angle (ICA) was measured by a Scheimflug camera (Sirius, CSO, Italy) the day before the injection of the dexamethasone implant and on postoperative day 1, first week, and first month. Results: Mean IOP was 15.14 ± 2.77 mmHg before the procedure and, 15.67 ± 3.70 mmHg, 15.86 ± 3.11 mmHg, 16.21 ± 2.75 mmHg on day 1, first week, and first month following intravitreal dexamethasone implantation, respectively. Mean ICA and ACD were significantly higher in pseudophakic eyes compared to phakic eyes. However, there was no statistically significant change in ICA before and after the procedure (on postoperative day 1, first week, and first month) among both phakic and pseudophakic patients ( p = 0.783). Similarly, ACD remained unchanged after the procedure (on postoperative day 1, first week, and first month) compared to the initial measurement ( p = 0.802). Conclusion: This study confirmed that there was an increase in IOP. However, these changes were not accompanied with a change in ACD or ICA.

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Section: Discussionmentioning

confidence: 96%

Anterior chamber changes assessment by Scheimpflug analysis after intravitreal dexamethasone implantation

Kucukkomurcu

Şahı̇n

2021

European Journal of Ophthalmology

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“…Optical biometry works with the principle of partial coherence interferometry. Optical biometry has many advantages over ultrasonic biometry in AL measurements, such as a noncontact feature and fast, accurate, reproducible results (15,16). While A-mode ultrasonography measures the distance between the corneal vertex and the vitreoretinal interface, optical biometry measures the distance between the corneal epithelium and RPE (10,12).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of axial length changes after combined phacovitrectomy for macula-off rhegmatogenous retinal detachment

Özal¹

2019

Beyoglu Eye J

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To evaluate the reliability of optical biometry for correct intraocular lens (IOL) power calculation in eyes with macula-off rhegmatogenous retinal detachment (RRD) via comparing the axial lengths (AL) measured with optical biometry preoperatively and postoperatively. Methods: This retrospective study was conducted with 25 eyes of 25 patients who underwent combined surgery (phacoemulsification and pars plana vitrectomy (PPV)) with the diagnosis of RRD with macular involvement. Best-corrected visual acuity (BCVA), biomicroscopic examination, intraocular pressure measurement and full fundoscopic examination were performed in all patients. Axial length was measured using optical biometry in all patients. The AL measurements were repeated in the postoperative third month in the patients using gas tamponade during vitreoretinal surgery and in the third month after the silicone oil removal in patients using silicone-oil tamponade during vitreoretinal surgery. Results: The mean age of the patients was 61.60±7.33. Fifteen patients (60%) were female, and 10 (40%) were male. Postoperative BCVA values (0.40±0.28) were significantly higher than the preoperative BCVA values (0.14±0.22) (p<0.05). The preoperative mean value of AL was measured as 24.66±1.90 and the postoperative mean value of AL was 24.67±1.91. There was no statistically significant difference between the measured AL values in the preoperative and postoperative periods (p=0.258). Conclusion:Combined surgery (phacoemulsification and PPV) is a frequently applied method in RRD treatment. The correct AL measurement is important for the removal of refractive errors due to AL measurement in patients with macula-off RRD. Optical biometry provides accurate results in these cases.

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Accuracy of segmented measurement of axial length in ultra-high myopia filled with silicone oil using immersion B-scan ultrasonography

Yang

Zhang

et al. 2022

Int J Ophthalmol

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AIM: To evaluate the accuracy of segmented measurement of axial length (AL) in high myopia filled with silicone oil by immersion B-scan ultrasonography (immersion B-scan). METHODS: From June 2016 to June 2020, a total of 67 ultra-high myopia inpatients (67 eyes) who underwent silicone oil removal combined with cataract extraction and intraocular lens (IOL) implantation were retrospectively enrolled. The preoperative axial length (AL) of 31 patients with severe cataract were segmented measured using immersion B-scan (B-scan group) and another 36 patients with mild or moderate cataract were measured using IOLMaster 500 (IOLMaster group). The post-operative ALs in two groups were both measured using IOLMaster 500. The IOL power was calculated with Haigis formula. The differences in ALs between pre- and post-surgery, as well as the postoperative refractive spherical equivalent, absolute refractive error, the prediction deviation of postoperative refraction and best corrected visual acuity (BCVA) were compared. RESULTS: The pre- and post-operative ALs were 30.46±1.63 mm (range 28.09-33.51 mm) and 30.42±1.70 mm (range 28.03-33.90 mm) in B-scan group (t=0.644, P=0.542) and 30.51±1.21 mm (range 28.03-33.90 mm) and 30.43±1.27mm (range 28.54-33.50 mm) in IOLMaster group (t=1.843, P=0.074), respectively. Three months after surgery, BCVA were 0.45±0.13 (range 0.3-0.9) and 0.44±0.20 (range 0.2-1.0) in B-scan and IOLMaster group respectively (t=0.086, P=0.932). There was no significant difference of the postoperative spherical equivalent (-3.11±0.65 D vs -3.21±0.51 D, t=0.671, P=0.505) and the absolute refractive error (0.589±0.340 vs 0.470±0.245 D, t=1.615, P=0.112) between two groups. In B-scan group, absolute refractive error within ±0.50 D was found in 18 eyes (58.1%), within ±1.00 D in 26 eyes (83.9%), and within ±1.50 D in 31 eyes (100%). In IOLMaster group, absolute refractive error within ±0.50 D was found in 23 eyes (63.9%), within ±1.00 D in 34 eyes (94.4%), and within ±1.50 D in 36 eyes (Z=0.757, P=0.449). CONCLUSION: The segmented measurement of ALs by immersion B-scan shows comparable measurement accuracy with that of IOLMaster 500 in ultra-high myopia patients with severe cataract secondary to silicone oil filling and can obtain an ideal postoperative refractive state.

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Optical biometry-based axial length alterations after intravitreal dexamethasone implant

Cited by 3 publications

References 28 publications

Anterior chamber changes assessment by Scheimpflug analysis after intravitreal dexamethasone implantation

Anterior chamber changes assessment by Scheimpflug analysis after intravitreal dexamethasone implantation

Evaluation of axial length changes after combined phacovitrectomy for macula-off rhegmatogenous retinal detachment

Accuracy of segmented measurement of axial length in ultra-high myopia filled with silicone oil using immersion B-scan ultrasonography

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