Editor, In paediatric chronic glomerulonephritis, systemic corticosteroid treatment is administered for a long period of time. Therefore, there is a high probability of steroid-induced ocular complications such as cataracts and glaucoma. We examined the association of ocular complications with systemic corticosteroid treatment through clinical reports conducted on a large number of Korean children with chronic glomerulonephritis. We retrospectively analysed medical records of 238 Korean children with chronic glomerulonephritis who received systemic corticosteroid treatment between January 2000 and December 2006 in the Department of Pediatrics at Kyung-Hee University Medical Center. Systemic corticosteroid treatment is divided into methylprednisolone pulse treatment and long-term low-dose oral prednisolone treatment. The number of pulse treatment cycles given depended on the degree of proteinuria improvement. After pulse treatment, low-dose oral prednisolone was administered and slowly tapered. The duration of the corticosteroid administration was calculated at the time the intraocular complications developed. If the intraocular complications did not develop in the patients, the duration was calculated at the time of last observation. The total corticosteroid dose was calculated based on the sum of corticosteroid used for methylprednisolone pulse treatment and low-dose oral corticosteroid treatment during the entire treatment period. All patients were examined for the occurrence of cataracts and measurement of intraocular pressure (IOP) before and every 3–6 months after starting corticosteroid treatment. The association of cataract and glaucoma with dose and duration of corticosteroid treatment was analysed statistically by using the binary logistic regression analysis. Cataracts occurred in 74 patients, an incidence of 31%. In cataract cases, there was a statistically significant association with the frequency of intravenous methylprednisolone pulse treatment (Table 1). So exposure to high-dose corticosteroid may accelerate the onset of corticosteroid-induced cataract formation. Several reports especially have investigated the relationship between corticosteroid pulse treatment and cataracts. Nakamura et al. (2003) reported that in postrenal transplant, corticosteroid pulse treatment is considered to be a risk factor for developing steroid cataracts. Nerome et al. (2008) reported that in paediatric patients, frequency of intravenous methylprednisolone pulse treatment was a significant risk factor for inducing cataracts. But considering that total corticosteroid dose, total corticosteroid dose per weight was not associated with cataract formation, the duration of high-dose corticosteroid treatment may be a more significant risk factor for inducing cataract than high dose of corticosteroid. Pavlin et al. (1977) reported that in 62 recipients of renal transplants, a positive correlation was found between the development of cataracts and the number of days on which the dose exceeded 100 mg. Therefore, extensive high-dose corticosteroid exposure, such as a high frequency of intravenous methylprednisolone pulse treatment, encourages cataract formation and needs comprehensive ophthalmic examination. Regarding IOP, based on a cut-off of 21 mmHg, 92 patients (39%) showed elevation of IOP. In elevated IOP cases, the reverse relationship to corticosteroid treatment duration was showed (Table 2). To our knowledge, there are no reports in the literature that suggested reverse relationship between elevated IOP and corticosteroid treatment duration. It is thought that this implies the presence of specific children whose IOP is elevated even though corticosteroid was used only for a short period of time, as well as specific children whose IOP was not elevated despite the use of corticosteroids for a long time. It may be closely related to the individual susceptibility (Niaudet 1994; Loke et al. 1997). We conclude that, in 238 Korean children with chronic glomerulonephritis receiving systemic corticosteroid treatment, the incidence of cataract was associated with the frequency of intravenous methylprednisolone pulse treatment. Comprehensive ophthalmic examination may be suggested when frequent intravenous methylprednisolone pulse treatment is administered.