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Background and Objective: Glaucoma is one of the most important cause of blindness wordwide. Exact determination of intra ocular pressure is important for the diagnosis and decision making about glaucoma treatment. Central corneal thickness is considered as effective factor on intra ocular pressure and visual field defect. This study was carried out to determine the relationship between central corneal thickness, intra ocular pressure and visual field in normal tension and primary open angle glaucoma. Materials and Methods: This descriptive study was carried out on 45 eyes with normal tension glaucoma and 45 eyes with primary open angle glaucoma in Al-Zahra ophthalmology hospital in Zahedan, Iran during 2010. Intra ocular pressure and central corneal thickness were measured by Goldman tonometer and pachymeter and visual field exanimated by Humphrey perimeter. Data were analyzed using SPSS-16, paired t-test, ANOVA, Mann–Whitney and Pearson corlateion tests. Results: There was significant correlation between central corneal thickness and intra ocular pressure (r=0.309, P<0.05). A significant difference was detected in intra ocular pressure between two type of glaucoma (P<0.05). Mean value of central corneal thickness in patient with mild visual field defect was higher than severe visual field defect but there was not significant statistical difference between central corneal thickness and visual field defect in subjects with glaucoma. Conclusion: This study indicated that increasing corneal thickness is accompanied with intra occular presure.

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Red eye is the most common sign of ocular inflammation. Serious cases of red eye need diagnosis and proper treatment by ophthalmologist but many other from of red eye can be managed primarily by health care personals. If General practioners were able to diagnose and differentiate the causes of red eye the serious complication have not been observed and the patients were have been treated on due time. Some of the causes of red eye are: blepharitis, corneal erosion, sub conjunctival hemorrhage, glaucoma, episcleritis and scleritis.

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The rise in patients seeking corneal refractive surgery, despite having systemic autoimmune diseases, underscores the need for special considerations when treating these individuals. Recent studies have expanded our knowledge in identifying and evaluating autoimmune disorders and their potential side effects in the results of corneal refractive surgery with laser. This study briefly examines the pathogenic factors, clinical aspects, and possible complications in patients with systemic autoimmune disorders subjected to these surgeries. In total, 132 articles were selected for this research among the reviewed studies. Considering that the release of various cytokines caused by systemic autoimmune disorders can lead to destructive corneal consequences, the need for early diagnosis before any laser surgery for refractive errors seems essential. Although procedures such as LASIK and PRK are commonly performed on patients with autoimmune disorders, important considerations must be made. Studies have not yet confirmed definitive contraindications to laser refractive surgery for autoimmune disorders.

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Background and Objective: Evaluating the agreement among various corneal imaging devices is crucial due to their varying technologies in diagnosing corneal parameters. This study aimed to assess the agreement of Advanced Corneal Explorer (ACE) with Pentacam and Orbscan in myopic individuals with healthy corneas.
Methods: This descriptive-analytical study was conducted on 45 myopic individuals (25 women and 20 men; mean age=30.37±6.13 years) referring to Al-Zahra Ophthalmology Hospital in Zahedan, Iran, during 2023. Anterior segment imaging was performed using three devices: ACE, Pentacam, and Orbscan. Corneal parameters, including topography, tomography, and corneal aberrations, were examined. The intraclass correlation coefficient (ICC) and 95% limits of agreement (LoA) were used to evaluate the agreement of ACE data with the data obtained from the other two devices.
Results: ACE exhibited good agreement with Pentacam for the mean power (ICC=0.97), maximum power (ICC=0.98), and minimum power of the anterior corneal surface (ICC=0.97) (P<0.05). Additionally, ACE exhibited good statistical agreement with Orbscan for the mean power of the anterior corneal surface due to an ICC of 0.98 (P<0.05). The ICC values for central corneal thickness and thinnest corneal thickness with the ACE and Pentacam devices were 0.99 and 0.95, respectively, indicating significant statistical agreement (P<0.05). White-to-white distance, pupil size, and corneal aberrations did not show good agreement among the three devices (ICC<0.75).
Conclusion: Topography values and corneal thickness measured with ACE showed good agreement with Pentacam; therefore, they can be used interchangeably. Other measured variables from ACE did not show good agreement with Pentacam and Orbscan and are not interchangeable.