Purpose: This study aimed to evaluate the prediction accuracy of four intraocular lens (IOL) power calculation formulas; Barrett Universal II, SRK/T, Hoffer-QST, and Kane, using conventional keratometry (K) and total keratometry (TK) in patients who underwent implantation of a four-haptic hydrophobic multifocal IOL (Artis Symbiose Plus®). Methods: We analyzed 26 patients (32 eyes) who underwent cataract surgery with implantation of the Artis Symbiose Plus®. Preoperative biometric data, including axial length, keratometry, anterior chamber depth, and lens thickness, were measured using IOL Master 700®. Postoperative refractive outcomes were compared with the target refractive errors derived from four formulas with K and TK. The mean error, mean absolute error, and median absolute error were calculated at 1 and 3 months postoperatively. The results were compared between the formulae and K and TK. Results: At 3 months postoperatively, Barrett Universal II and Kane showed significantly lower refractive errors from the target diopter than SRK/T and Hoffer-QST, with Barrett Universal II showing the most hyperopic shift and SRK/T the most myopic than the target refractive error. No significant difference in refractive prediction was found between K and TK across all the formulas. The proportion of eyes with refractive errors within ± 0.50 diopter (D) and ± 1.00 D was highest for Barrett Universal II and Kane, with no statistical significance. Conclusions Barrett Universal II and Kane provided superior refractive accuracy compared to SRK/T and Hoffer-QST for Artis Symbiose Plus®. There was no significant difference between K and TK in predicting refractive outcomes.

Purpose: This study aimed to report a series of cases of cytomegalovirus retinitis reactivation in immunocompromised patients, focusing on the characteristic clinical and laboratory findings associated with reactivation.Case summary: We retrospectively reviewed the medical records of patients diagnosed with cytomegalovirus retinitis at our clinic between January 2012 and November 2023. We analyzed ophthalmologic clinical findings and diagnostic test results, including quantitative cytomegalovirus polymerase chain reaction (CMV PCR). Reactivation was defined as the resolution or stabilization of the overall lesions on fundus examination, followed by the identification of new retinitis or vitreitis findings. The analysis excluded patients with cytomegalovirus retinitis resistant to ganciclovir or foscarnet. Among 24 patients (34 eyes) treated for cytomegalovirus retinitis, four showed reactivation, and the remaining 20 patients showed improvement with initial treatment. Recurrence occurred at an average of 24.8 days (18–35) after discontinuation of ganciclovir maintenance treatment, and in all cases, new lesions were discovered at the border of existing lesions. The CMV PCR test value tended to increase an average of 8 days (4–14) before recurrence was observed on fundus examination, and declined absolute neutrophil count preceded the increase in CMV PCR by an average of 12.8 days (6–26). Conclusions Monitoring quantitative CMV PCR tests in immunocompromised patients with cytomegalovirus retinitis could be helpful in predicting reactivation.

Purpose: Lattice corneal dystrophy type 1 (LCD1) typically presents with linear lesions in the corneal stroma. We report an atypical case of a patient with LCD type 1, who exhibited granules and deep lines resembling granular corneal dystrophy type 2 (GCD2) in one eye and maps and dots resembling epithelial basement membrane dystrophy (EBMD) in the contralateral eye.Case summary: A 22-year-old woman presented with progressive visual disturbances. Slit lamp examination revealed subepithelial granular opacities and linear lines in one eye and maps and dots in the other eye. Peripheral blood was collected, and genomic sequencing of transforming growth factor β-induced protein (TGFBI) was performed to identify any mutations. The sequencing revealed a heterozygous Arg124Cys (R124C) mutation, which is diagnostic for LCD1. Serial examinations over the years indicated a spontaneous reduction in the granular deposits and an increase in the lattice component, illustrating the progression of the phenotypic traits associated with LCD. Conclusions Although the R124C mutation of TGFBI is known to be associated with LCD1, it can manifest clinical characteristics similar to GCD2 or EBMD in the early stages of the disease. Genetic testing is recommended for definitive diagnosis in cases of TGFBI-related corneal dystrophies.

Purpose: To compare the effects on axial elongation and associated factors between orthokeratology lenses and 0.025% low-concentration atropine eye drops. Methods: A retrospective analysis was conducted on the medical records of children matched by sex and age, with a spherical equivalent difference within 0.125 diopters, who were followed for more than 2 years after starting treatment with orthokeratology lenses or 0.025% low-concentration atropine eye drops. The results of refractive error and axial length were analyzed using an independent t-test, paired t-test, Pearson correlation test, and multiple regression analysis. Results: Seventy-four patients (92 eyes) were included in this study. Before treatment, the axial length was 24.44 ± 0.91 mm in the orthokeratology lenses group and 24.67 ± 0.80 mm in the low-concentration atropine eye drops group. There were no statistically significant differences between the two groups in age at the start of treatment, sex, spherical equivalent, and axial length before treatment. At the 2-year follow-up, the mean axial length change was 0.53 ± 0.30 mm in the orthokeratology lenses group and 0.49 ± 0.26 mm in the low-concentration atropine eye drops group, respectively. There were no statistically significant differences between the two groups in the mean axial length change. Additionally, the age at the start of treatment showed a significant negative correlation with the axial length change in both the orthokeratology lenses group and the low-concentration atropine eye drops group (p = 0.001, p = 0.011, respectively). Conclusions There was no significant difference in axial elongation for 2 years between orthokeratology lenses and 0.025% low-concentration atropine eye drops treatment groups. Since younger age was associated with faster eye growth, it is important to actively consider treatment in cases of early onset myopia.

Purpose: The aim of this study was to summarize the clinical characteristics and outcomes of patients with ocular chemical injury by analyzing their medical records from January 2018 to December 2023. Methods: This study involved a retrospective review of patient data, including age, sex, season, location of ocular chemical injury, causative agents (properties, pH values), initial and final ocular findings including visual acuity and intraocular pressure, distribution and severity of chemical injury, management methods, and complications. Results: A total of 218 patients were included in this study. Most patients were aged between 27 and 56 years. The most common ocular injury setting, season, severity classifications, causative chemical agent, management method, and complications were domestic households, summer and winter, grade I, acidic substance, medical treatment, and no complications, respectively. Conclusions We evaluated the clinical characteristics and outcomes of patients with ocular chemical injuries in Incheon, South Korea. Despite societal changes and widespread safety education, ocular chemical injuries still occur owing to various substances and situations. Therefore, self-protection and comprehensive educational programs should be encouraged to prevent ocular chemical damage.

Purpose: This study aimed to evaluate changes in optical quality after pterygium excision. Methods: We retrospectively reviewed the medical records of 14 patients (14 eyes) who had undergone pterygium excision using a limbal conjunctival autograft. All participants underwent the best-corrected visual acuity (BCVA) test, corneal topography, and Optical Quality Analysis System (OQAS) test preoperatively and 1 month postoperatively. The changes in these parameters associated with surgery were analyzed. Results: The participants were 10 men (10 eyes) and four women (four eyes), with a mean age of 61.6 years. There was no significant difference in the BCVA preoperatively and 1 month postoperatively. Corneal topography revealed significantly reduced astigmatism and OQAS showed that the modulation transfer function (MTF) cutoff value and Strehl ratio significantly improved postoperatively. Pterygium-induced astigmatism was significantly associated with the objective scatter index, MTF cutoff value, and Strehl ratio. Conclusions Pterygium excision may result in improved optical quality, suggesting that pterygia can decrease optical quality. A greater degree of pterygium-induced astigmatism may be associated with a more severe impairment of optical quality.

Purpose: To assess the effect of posterior strut removal during orbital decompression on exophthalmos reduction and strabismus outcomes in patients with Graves’ orbitopathy (GO). Methods: This retrospective analysis was conducted using the medical records of patients with GO who underwent balanced orbital decompression, balanced orbital decompression with posterior strut removal, or three-wall orbital decompression with strut removal. The preoperative and postoperative exophthalmos measurements were compared to evaluate the efficacy of strut removal in reducing exophthalmos. Patients were further divided into three groups based on the posterior strut removal status (none, unilateral, or bilateral) to evaluate changes in esotropia and vertical strabismus before and after surgery. Results: This study included 61 patients (101 eyes). Balanced orbital decompression was performed in 42 eyes, balanced orbital decompression with posterior strut removal was performed in 14, and three-wall orbital decompression was performed in 45 eyes. The average postoperative exophthalmos reduction was 4.20 ± 0.25 mm in the balanced orbital decompression group, 4.92 ± 0.29 mm in the balanced orbital decompression with posterior strut removal group, and 5.62 ± 0.58 mm in the three-wall orbital decompression group. The reductions in the balanced orbital decompression with posterior strut removal and three-wall orbital decompression groups were statistically significant compared to those in patients who only underwent balanced orbital decompression. The most notable increase in esotropia was observed in the unilateral strut removal group (2.00 ± 1.32 diopters), although this difference was not statistically significant compared to those in other groups. Furthermore, no significant differences in vertical strabismus were observed among the three groups, with a tendency towards reduced strabismus in the bilateral strut removal group. Conclusions Posterior strut removal during orbital decompression surgery resulted in a significant improvement in exophthalmos, with no significant effect on strabismus.

Orthokeratology lenses are effective methods for controlling myopia progression. This paper describes the principles and effects of orthokeratology lenses, focusing on randomized controlled trials investigating their ability to prevent myopia progression. While the short-term effects are widely accepted, further well-designed studies are required to assess the persistence of long-term benefits and the possibility of a rebound phenomenon after lens discontinuation. Additionally, both physicians and patients should prioritize safety, particularly in preventing complications such as infectious keratitis.

Viral anterior uveitis is an inflammatory disease caused by pathogens such as herpes simplex virus (HSV), varicella-zoster virus (VZV), and cytomegalovirus (CMV), often leading to corneal endothelial cell damage. Endothelial cell loss progresses due to various factors, including direct viral infection, immune responses, elevated intraocular pressure, and surgical interventions. These processes can result in corneal edema and vision loss. Accurate diagnosis requires aqueous humor polymerase chain reaction and high-resolution imaging, and the treatment typically involves a combination of antiviral and anti-inflammatory therapies.

Purpose: To evaluate degree of insight, accessibility to medical care, and availability of regular ocular screening examinations before diagnosis for Korean patients with wet age-related macular degeneration. Methods: Data were collected from 95 patients by questionnaire and analyzed at Seoul National University Boramae Medical Center. Results: Although 80.0% of the patients considered themselves old, only 2.1% thought they were susceptible to wet age-related macular degeneration. Of the overall patients, 48.4% thought their disease was serious despite treatment with intravitreal injections. A majority (71.6%) thought that medical care was easily accessible, 67.4% answered that hospitals were located close by, and 90.5% answered that it was easy to make appointments and they had time to visit the hospital. However, only 15.8% answered that they had undergone regular ocular examinations before being diagnosed with wet age-related macular degeneration. Conclusions Although most patients believed that they had easy access to medical care, only 15.8% underwent regular ocular examinations. Therefore, regular ocular examinations, including fundal examinations, are required in national health screening programs. It is also important to raise public awareness of wet age-related macular degeneration by educating the general population.