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Purpose: This study aimed to evaluate the effect of inferior oblique myectomy (IOM) surgery on the cornea and anterior segment. Methods: The sheimpflug corneal topographies of 56 eyes of 33 patients who underwent IOM were analyzed at preoperative, postoperative 1 week, 1 month, 3 months, and 6 months. Astigmatism degree (Cyl), astigmatism axis (Ax), K1, central corneal thickness (CCT), anterior chamber depth (ACD), anterior chamber volume (ACV), iridocorneal angle (ICA), and horizontal visible iris diameter (HVID) were evaluated. Results: The mean corneal Cyl, K1, ICA, ACD, and HVID did not change after IOM (p=0.671, p=0.377, p=0.431, p=0.588, p=0.795, respectively). There was a statistically significant change in Ax (p=0.025). The right Ax decreased, and the left Ax increased the most at 1 month (p=0.025, p=0.882, respectively). Ax increase was also detected in the left eye that was not operated on. The mean CCT increased and mean ACV decreased at 1 month (p=0.588, p=0.270, respectively), but these changes returned to preoperative values at 3 months. Conclusion: The manifestation of anterior segment alterations and intorsion in both eyes following inferior oblique myectomy may contribute to diminished visual acuity and the potential onset of amblyopia. These alterations merit consideration during the assessment, and if deemed necessary, the provision of new spectacles should be considered as a preventive measure against anisometropic amblyopia.

Copyright of MN Opthalmology / MN Oftalmoloji is the property of Medical Network and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of MN Opthalmology / MN Oftalmoloji is the property of Medical Network and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of MN Opthalmology / MN Oftalmoloji is the property of Medical Network and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objectives: To evaluate and compare anterior segment changes in patients taking alpha-1 (α1) blockers (tamsulosin, terazosin, doxazosin, alfuzosin) for benign prostatic hypertrophy, during drug intake and drug-free period, using ultrasound biomicroscopy (UBM). Materials and Methods: In this prospective study, UBM was done before and after pupil dilatation in 31 phakic eyes of 19 male patients taking α1-blockers. Undilated and dilated UBM was repeated before cataract extraction, after stopping the drug for 10 days. On ideal images, pupil diameter (PD), anterior chamber depth (ACD), anterior chamber angle (ACA), and angle opening distances at points 500 µm and 250 µm from the scleral spur (AOD500 and AOD250) values were noted and changes in parameters were evaluated to reveal any changes that occurred after discontinuing the drug. No patient in the study was previously or currently using any other α1-adrenergic antagonist medication. Exclusion criteria for all patients included a history of diabetes mellitus, systemic hypertension, glaucoma, pseudoexfoliation syndrome, chronic use of medicated eye drops, and previous ocular surgery. Results: PD, ACD, ACA, AOD500 and AOD250 values measured before pupil dilatation in the drug-free period were not significantly different from those measured during α-blocker intake (p>0.05). In dilated eyes, the mean value of AOD500 was 0.35±0.08 mm during drug usage and 0.39±0.08 mm in the drug-free period. The mean value of AOD250 was 0.23±0.06 mm during drug usage and 0.26±0.07 mm after discontinuation. These increments were statistically significant (p0.05). Conclusion: The interruption of taking α1-blockers in patients who have benign prostatic hypertrophy does not seem to influence anterior segment parameters generally. However, further investigation is needed.

Objectives: To determine the early signs of pseudoexfoliation (PEX) in fellow eyes of cases with unilateral PEX. Materials and Methods: Fellow eyes of 34 cases with unilateral PEX were evaluated by slit-lamp and gonioscopy. Findings associated with PEX were recorded. Results: Mean age was 67.8±8.1 years (range 55-86 years). Twenty-five patients (73.5%) had pigmentation in the inferior angle and 23 patients (67.6%) had Sampaolesi’s line located on the inferior angle in fellow eyes. The other most common findings were loss of peripupillary ruff in 10 patients (29.4%) and pigment dispersion following pupil dilation in 14 patients (41.1%). Conclusion: Pigmentation in the inferior angle and Sampaolesi’s line on the inferior angle seem to be the most common early findings associated with PEX. Special attention should be paid to these findings in cases with ocular hypertension for proper management.

Objectives: To describe the ophthoselfie, a method by which everyone can take detailed self-images of the cornea and anterior segment with a smartphone. Materials and Methods: A 90-diopter non-contact double aspheric lens was attached to posterior camera of the smartphone by clear tape. Images of one eye on the screen of the smartphone could be seen with the other eye in the mirror and images were taken. Results: Accurate and detailed images of the cornea and anterior segment of the eye could be taken. Conclusion: The ophthoselfie allows everyone to take their own detailed anterior segment images by smartphone. To create a clear and detailed self-image of the cornea and anterior segment on the screen of a smartphone may lead to the development of new applications and facilitate patients’ early recognition of certain conditions like keratoconus, refractive errors, corneal rejection, and uveitis. This method may also be useful in some urgent situations by allowing patients to take self-images of the eye and share them with a physician.

Purpose: To evaluate the anterior segment structures using Pentacam in pediatric cases. Material and Method: One hundred sixty-two eyes (study group) of 81 healthy children who attended our clinic were compared with 114 eyes (control group) of 57 healthy adults. The central corneal thickness, anterior chamber volume, and anterior chamber depth of all cases were evaluated with Pentacam. Independent t-test and Pearson’s correlation analysis were used for statistics. Results: The mean age of the study group (40 male, 41 female) was 9.99±2.80 (range: 6-16) years. The mean central corneal thickness in the right eyes was 580.74±42.04 (range: 492-669) micrometers and in the left eyes was 586.52±43.51 (range: 495-699) micrometers. The mean anterior chamber depth, volume, and anterior chamber angle were 3.02±0.29 (range: 2.39-3.9) mm, 176.43±31.77 (range: 117-272) mm3 and 36.23±5.41 (range: 25.8-50.7) degree, respectively. When the right and the left eyes were compared, significant differences were observed between central corneal thickness (p=0.001) and anterior chamber angles (p=0.05). The mean left eye keratometry was found to be significantly flatter in children (p=0.002). The mean anterior chamber depth, anterior chamber volume, and anterior chamber angle values were higher in children than in adults (p

Purpose: To evaluate the anterior segment structures with Pentacam in scleroderma patients. Materials and Methods: The 34 eyes (study group) of 17 scleroderma patients who attended our clinic were compared with 40 eyes (control group) of age-matched 20 healthy individuals. Best-corrected visual acuity (BCVA) and intraocular pressure of all cases were measured, and anterior and posterior segment examinations were performed. The central corneal thickness, anterior chamber volume, anterior chamber depth, anterior and posterior elevation maps of all cases were evaluated with Pentacam. Parametric values were compared with independent t-test; non-parametric values were calculated with Mann-Whitney U test. Results: The mean age was 51.63±10.74 (range, 28-72) years in the study group (1 male, 16 female) and 51.42±6.74 (range, 40-66) years in the control group (4 male, 16 female). The corneas of the study group were found to be more refractive: the mean K values of the study and the control groups were 44.38±1.38 and 43.47±1.26 D, respectively, p=0.004. The BCVA in the study group was statistically lower than that in the control group (mean BCVA of the study and the control groups: 0.953±0.0915 and 0.992±0.0408, respectively, p=0.001). There was no significant difference between the two groups regarding anterior chamber depth, anterior chamber volume and anterior chamber angle. No difference was found in central corneal thickness, intraocular pressure, spherical equivalent, anterior and posterior elevation maps among the two groups. Conclusion: Scleroderma is a systemic disease that might lead to alterations in corneal biomechanics and refractivity, and these issues need to be investigated with more advanced studies. (Turk J Ophthalmol 2011; 41: 221-4)

Purpose: To measure the cornea and anterior chamber parameters using Sirius® topographer in healthy adults and to determine the variation with respect to age, gender and right-left eye separation. Materials and Methods: 214 eyes of 107 healthy patients were evaluated prospectively. The central corneal thickness (CCT), simulated keratometry value (Sim K), horizontal visible iris diameter (HVID), corneal volume (CV), anterior chamber depth (ACD), anterior chamber volume (ACV) and anterior chamber angle (ACA) of all cases were measured using Sirius topographer. Results: The median age of patients (54 males and 53 females) was 28 (18-56) years. The mean of CCT was 541.5±31.7 micrometers. The mean of the other parameters were measured as Sim K 43.26±1.44 diopters, HVID of 11.86±0.39 mm, CV of 58±3.3 mm3, ACD of 3.01±0.33 mm, ACV of 160.1±33.1 mm3. The median of ACA was 43˚ (22˚-53˚). Measured parameters were compared with respect to right-left eye separation, and no statistically significant difference (p>0.05) was observed. Comparison in terms of gender revealed, in women, smaller HVID (p=0.001), smaller ACD (p=0.006), smaller ACV (p=0.013), smaller ACA (p=0.001), and yet larger average Sim K (p=0.014). Correlation analysis indicated statistically significant negative effect of age on CCT, CV, ACD, ACV and the ACA (p<0.05), but a positive effect on sim K (with r=-0.174, -0.181, -0.520, -0.555, -0.309, 0.176, respectively). Conclusion: Some of the parameters measured with Sirius® showed significant differences with respect to age and gender. In women, HVID, ACD, ACV and ACA are smaller, while Sim K value is larger. CCT, CV, ACD, ACV and the ACA decrease, while average keratometry value increase with age. [ABSTRACT FROM AUTHOR]

Objective: It was aimed to compare anterior segment parameters obtained by rotating Scheimpflug camera system according to age groups. Methods: 290 eyes of 145 emmetropic subjects were included in the study. Subjects were divided in three age groups. Group 1 comprised the subjects age up to 20 years, Group 2 comprised the subjects age between 21 and 40 and Group 3 comprised the subjects between 41 years and older. In all subjects, flat keratometry (K1), steep keratometry (K2), mean corneal power (Km), maximum keratometry (Kmax), central corneal thickness (CCT), apex corneal thickness (ACT), thinnest corneal thickness (TCT), anterior chamber volume (ACV) and anterior chamber depth (ACD) were obtained by using rotating Scheimpflug camera system. To eliminate operator dependent variables, automatic release mode was used. All measurements were obtained by the same examiner. Results: The study included 72 female and 73 male subjects. The mean age of the subjects was 31.37±12.29 years (range, 8-65). There were no significant differences in keratometric values between age groups. There was significant difference between Groups 1 and 3 and Groups 2 and 3 in the mean CCT, ACT and TCT (p<0.05). There was significant difference between the groups in the mean ACD and ACV. There significant positive correlation between age and CCT (r=0.181, p=0.001), ACT (r=0.161, p=0.006) and TCT (r=0.16, p=0.006). There were significant negative correlations between age and ACD (r=-0.376, p<0.001) and ACV (r=-0.367, p<0.001). Conclusion: In the emmetropic eyes, significant reduction was found in ACD and ACV, while there was significant increase in CCT, ACT and TCT by age. [ABSTRACT FROM AUTHOR]

Purpose: To evaluate the anterior segment structures with Pentacam in scleroderma patients. Materials and Methods: The 34 eyes (study group) of 17 scleroderma patients who attended our dinic were compared with 40 eyes (control group) of age-matched 20 healthy individuals. Best-corrected visual acuity (BCVA) and intraocular pressure of all cases were measured, and anterior and posterior segment examinations were performed. The central corneal thickness, anterior chamber volume, anterior chamber depth, anterior and posterior elevation maps of all cases were evaluated with Pentacam. Parametric values were compared with independent t-test; non-parametric values were calculated with Mann-Whitney U test. Results: The mean age was 51.63±10.74 (range, 28-72) years in the study group (1 male, 16 female) and 51.42±6.74 (range, 40-66) years in the control group (4 male, 16 female). The corneas of the study group were found to be more refractive: the mean K values of the study and the control groups were 44.38± 1.38 and 43.47± 1.26 D, respectively, p=0.004. The BCVA in the study group was statistically lower than that in the control group (mean BCVA of the study and the control groups: 0.953±0.09l 5 and 0.992±0.0408, respectively, p=0.001). There was no significant difference between the two groups regarding anterior chamber depth, anterior chamber volume and anterior chamber angle. No difference was found in central corneal thickness, intraocular pressure, spherical equivalent, anterior and posterior elevation maps among the two groups. Conclusion: Scleroderma is a systemic disease that might lead to alterations in corneal biomechanics and refractivity, and these issues need to be investigated with more advanced studies. [ABSTRACT FROM AUTHOR]

Purpose: To evaluate the anterior segment structures using Pentacam in pediatric cases. Material and Method: One hundred sixty-two eyes (study group) of 81 healthy children who attended our clinic werecompared with 114 eyes (control group) of 57 healthy adults. The central corneal thickness, anterior chamber volume, and anterior chamber depth of all cases were evaluated with Pentacam. Independent t-test and Pearson’s correlation analysis were used for statistics. Results: The mean age of the study group (40 male, 41 female) was 9.99±2.80 (range: 6-16)years. The mean central corneal thickness in the right eyes was 580.74±42.04 (range: 492-669) micrometers and in the left eyes was 586.52±43.51(range: 495-699) micrometers. The mean anterior chamber depth, volume, and anterior chamber angle were 3.02±0.29 (range: 2.39-3.9) mm,176.43±31.77 (range: 117-272) mm3 and 36.23±5.41 (range: 25.8-50.7) degree, respectively. When the right and the left eyes were compared, significant differences were observed between central corneal thickness (p=0.001) and anterior chamber angles (p=0.05). The mean left eye keratometry was found tobe significantly flatter in children (p=0.002). The mean anterior chamber depth, anterior chamber volume, and anterior chamber angle values were higher in children than inadults (p<0.001). Discussion: Pentacam is an easy-to-use and noninvasive technique that can be used for the evaluation of central corneal thicknessand anterior chamber even in pediatric cases. Significant differences were detected in measurements with this device between adults and pediatric cases, and between the right and left eyes. Being aware of these differences in normal eyes will be a guide in correct evaluation of pathologic eyes. [ABSTRACT FROM AUTHOR]