1.Anterior Segment Swept-Source Optical Coherence Tomography–based Assessment of Corneal Refractive Profiles in Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis Patients: A Controlled Comparative Study
Dong Hee HA ; Seung Hyeun LEE ; Kyoung Woo KIM
Korean Journal of Ophthalmology 2025;39(2):103-113
Purpose:
To analyze anterior, posterior, and total corneal refractive profiles and thickness using anterior segment (AS) sweptsource optical coherence tomography (SS-OCT) in Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN) patients.
Methods:
This retrospective study compared 23 eyes from 14 patients with SJS/TEN with 23 eyes from 14 age- and sexmatched controls. AS SS-OCT measured corneal refractive profiles and pachymetry. Parameters included anterior, posterior, and total corneal power values, posterior to anterior curvature ratio, maximal corneal power, and thickness profiles. The SJS/TEN group was subdivided based on corneal opacity presence (subgroup A) or absence (subgroup B).
Results:
The SJS/TEN group showed significantly higher corneal astigmatism and maximal corneal power values for both anterior and posterior curvatures. Steep total corneal power and total corneal astigmatism were higher in the SJS/TEN group. The thinnest corneal thickness was lower, and its distance from the corneal vertex was greater in the SJS/TEN group. Subgroup analysis revealed that these differences were primarily attributed to the presence of corneal opacity. Additionally, automated keratometry of the anterior corneal surface showed significantly higher values, including steep, flat, and average keratometry and corneal astigmatism, in the SJS/TEN group.
Conclusions
AS SS-OCT shows significant alterations in both anterior and posterior corneal curvatures in patients with SJS/TEN. These findings emphasize the importance of considering posterior corneal curvature changes in pre-cataract surgery assessments and contact lens prescriptions for patients with SJS/TEN.
2.Objective Changes in the Contralateral Eye after Unilateral Cataract Surgery
Seung Hyeun LEE ; Kyoung Woo KIM ; In Ki PARK ; Yeoun Sook CHUN
Korean Journal of Ophthalmology 2025;39(1):48-56
Purpose:
This study evaluated the objective changes in the contralateral eye after unilateral cataract surgery.
Methods:
The study was designed as retrospective observational study. It included 44 patients who underwent unilateral cataract surgery. Collected data were uncorrected and corrected visual acuity, spherical equivalent, intraocular pressure, contrast sensitivity (CS), stereoacuity, and anterior segment optical coherence tomography parameters. Data were collected preoperatively, and 1 week and 1 month postoperatively for each eye.
Results:
Following unilateral cataract surgery, the pupil size of the fellow eye decreased from 3.46 mm to 3.17 mm (postoperative week 1, p = 0.003) and 3.08 mm (postoperative month 1, p < 0.001). Anterior chamber depth of the fellow eye increased significantly from 3.16 mm to 3.27 mm (postoperative week 1, p = 0.005) and 3.26 mm (postoperative month 1, p = 0.001). Uncorrected distance visual acuity (UDVA) of the fellow eye improved significantly at postoperative week 1 (p = 0.042) and postoperative month 1 (p = 0.044). Change of UDVA of the fellow eye at postoperative month 1 was significantly correlated with that of the treated eye (p = 0.039).
Conclusions
Anterior chamber structures changed and UDVA improved in the contralateral eye after unilateral cataract surgery in our cohort. Because fellow eyes were positively affected by monocular cataract surgery, it would be good information if planning for unilateral cataract surgery due to inevitable reasons.
3.Anterior Segment Swept-Source Optical Coherence Tomography–based Assessment of Corneal Refractive Profiles in Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis Patients: A Controlled Comparative Study
Dong Hee HA ; Seung Hyeun LEE ; Kyoung Woo KIM
Korean Journal of Ophthalmology 2025;39(2):103-113
Purpose:
To analyze anterior, posterior, and total corneal refractive profiles and thickness using anterior segment (AS) sweptsource optical coherence tomography (SS-OCT) in Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN) patients.
Methods:
This retrospective study compared 23 eyes from 14 patients with SJS/TEN with 23 eyes from 14 age- and sexmatched controls. AS SS-OCT measured corneal refractive profiles and pachymetry. Parameters included anterior, posterior, and total corneal power values, posterior to anterior curvature ratio, maximal corneal power, and thickness profiles. The SJS/TEN group was subdivided based on corneal opacity presence (subgroup A) or absence (subgroup B).
Results:
The SJS/TEN group showed significantly higher corneal astigmatism and maximal corneal power values for both anterior and posterior curvatures. Steep total corneal power and total corneal astigmatism were higher in the SJS/TEN group. The thinnest corneal thickness was lower, and its distance from the corneal vertex was greater in the SJS/TEN group. Subgroup analysis revealed that these differences were primarily attributed to the presence of corneal opacity. Additionally, automated keratometry of the anterior corneal surface showed significantly higher values, including steep, flat, and average keratometry and corneal astigmatism, in the SJS/TEN group.
Conclusions
AS SS-OCT shows significant alterations in both anterior and posterior corneal curvatures in patients with SJS/TEN. These findings emphasize the importance of considering posterior corneal curvature changes in pre-cataract surgery assessments and contact lens prescriptions for patients with SJS/TEN.
4.Objective Changes in the Contralateral Eye after Unilateral Cataract Surgery
Seung Hyeun LEE ; Kyoung Woo KIM ; In Ki PARK ; Yeoun Sook CHUN
Korean Journal of Ophthalmology 2025;39(1):48-56
Purpose:
This study evaluated the objective changes in the contralateral eye after unilateral cataract surgery.
Methods:
The study was designed as retrospective observational study. It included 44 patients who underwent unilateral cataract surgery. Collected data were uncorrected and corrected visual acuity, spherical equivalent, intraocular pressure, contrast sensitivity (CS), stereoacuity, and anterior segment optical coherence tomography parameters. Data were collected preoperatively, and 1 week and 1 month postoperatively for each eye.
Results:
Following unilateral cataract surgery, the pupil size of the fellow eye decreased from 3.46 mm to 3.17 mm (postoperative week 1, p = 0.003) and 3.08 mm (postoperative month 1, p < 0.001). Anterior chamber depth of the fellow eye increased significantly from 3.16 mm to 3.27 mm (postoperative week 1, p = 0.005) and 3.26 mm (postoperative month 1, p = 0.001). Uncorrected distance visual acuity (UDVA) of the fellow eye improved significantly at postoperative week 1 (p = 0.042) and postoperative month 1 (p = 0.044). Change of UDVA of the fellow eye at postoperative month 1 was significantly correlated with that of the treated eye (p = 0.039).
Conclusions
Anterior chamber structures changed and UDVA improved in the contralateral eye after unilateral cataract surgery in our cohort. Because fellow eyes were positively affected by monocular cataract surgery, it would be good information if planning for unilateral cataract surgery due to inevitable reasons.
5.Anterior Segment Swept-Source Optical Coherence Tomography–based Assessment of Corneal Refractive Profiles in Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis Patients: A Controlled Comparative Study
Dong Hee HA ; Seung Hyeun LEE ; Kyoung Woo KIM
Korean Journal of Ophthalmology 2025;39(2):103-113
Purpose:
To analyze anterior, posterior, and total corneal refractive profiles and thickness using anterior segment (AS) sweptsource optical coherence tomography (SS-OCT) in Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN) patients.
Methods:
This retrospective study compared 23 eyes from 14 patients with SJS/TEN with 23 eyes from 14 age- and sexmatched controls. AS SS-OCT measured corneal refractive profiles and pachymetry. Parameters included anterior, posterior, and total corneal power values, posterior to anterior curvature ratio, maximal corneal power, and thickness profiles. The SJS/TEN group was subdivided based on corneal opacity presence (subgroup A) or absence (subgroup B).
Results:
The SJS/TEN group showed significantly higher corneal astigmatism and maximal corneal power values for both anterior and posterior curvatures. Steep total corneal power and total corneal astigmatism were higher in the SJS/TEN group. The thinnest corneal thickness was lower, and its distance from the corneal vertex was greater in the SJS/TEN group. Subgroup analysis revealed that these differences were primarily attributed to the presence of corneal opacity. Additionally, automated keratometry of the anterior corneal surface showed significantly higher values, including steep, flat, and average keratometry and corneal astigmatism, in the SJS/TEN group.
Conclusions
AS SS-OCT shows significant alterations in both anterior and posterior corneal curvatures in patients with SJS/TEN. These findings emphasize the importance of considering posterior corneal curvature changes in pre-cataract surgery assessments and contact lens prescriptions for patients with SJS/TEN.
6.Objective Changes in the Contralateral Eye after Unilateral Cataract Surgery
Seung Hyeun LEE ; Kyoung Woo KIM ; In Ki PARK ; Yeoun Sook CHUN
Korean Journal of Ophthalmology 2025;39(1):48-56
Purpose:
This study evaluated the objective changes in the contralateral eye after unilateral cataract surgery.
Methods:
The study was designed as retrospective observational study. It included 44 patients who underwent unilateral cataract surgery. Collected data were uncorrected and corrected visual acuity, spherical equivalent, intraocular pressure, contrast sensitivity (CS), stereoacuity, and anterior segment optical coherence tomography parameters. Data were collected preoperatively, and 1 week and 1 month postoperatively for each eye.
Results:
Following unilateral cataract surgery, the pupil size of the fellow eye decreased from 3.46 mm to 3.17 mm (postoperative week 1, p = 0.003) and 3.08 mm (postoperative month 1, p < 0.001). Anterior chamber depth of the fellow eye increased significantly from 3.16 mm to 3.27 mm (postoperative week 1, p = 0.005) and 3.26 mm (postoperative month 1, p = 0.001). Uncorrected distance visual acuity (UDVA) of the fellow eye improved significantly at postoperative week 1 (p = 0.042) and postoperative month 1 (p = 0.044). Change of UDVA of the fellow eye at postoperative month 1 was significantly correlated with that of the treated eye (p = 0.039).
Conclusions
Anterior chamber structures changed and UDVA improved in the contralateral eye after unilateral cataract surgery in our cohort. Because fellow eyes were positively affected by monocular cataract surgery, it would be good information if planning for unilateral cataract surgery due to inevitable reasons.
7.Simultaneous Four-site Restoration of Bilateral Scleromalacia Using Autologous Tragal Perichondrium and Preserved Sclera
Yoonsoo NAM ; Seung Hyeun LEE ; Kyoung Woo KIM
Journal of the Korean Ophthalmological Society 2025;66(1):63-69
Purpose:
We report a case of bilateral nasal and temporal four-site scleromalacia following cosmetic conjunctivectomy, successfully managed with simultaneous restoration surgery at all four sites using autologous tragal perichondrium and preserved scleral graft.Case summary: A 56-year-old woman who underwent cosmetic conjunctivectomy on both eyes 15 years earlier, presented with intermittent eye pain. Examination revealed scleromalacia with calcium plaques in all four nasal and temporal scleral areas. The most extensive avascular area was in the nasal region of the right eye, and the most prominent uveal exposure was in the nasal area of the left eye. Considering the lesion and exposure sizes of the avascular zone and uvea exposure, preserved sclera was transplanted to the temporal and nasal areas of the right eye, while autologous tragal perichondrium was transplanted to the nasal area of the left eye. Tenon's capsule vessels were fixed with pedicle flaps in all four surgical areas for vascularization. Frozen amniotic membrane was transplanted in the nasal area of the left eye, where the conjunctival defect was substantial, and in the lateral area of the left eye, where no graft was used. The conjunctival epithelium was closed using autologous conjunctival flaps in all four areas. Post-surgery, successful engraftment and vascularization of the graft materials were observed in both eyes.
Conclusions
Even with multiple areas of scleromalacia in both eyes, successful results can be achieved during simultaneous surgery if an appropriate graft material is selected and the surgery is performed utilizing principles of tissue restoration.
8.Simultaneous Four-site Restoration of Bilateral Scleromalacia Using Autologous Tragal Perichondrium and Preserved Sclera
Yoonsoo NAM ; Seung Hyeun LEE ; Kyoung Woo KIM
Journal of the Korean Ophthalmological Society 2025;66(1):63-69
Purpose:
We report a case of bilateral nasal and temporal four-site scleromalacia following cosmetic conjunctivectomy, successfully managed with simultaneous restoration surgery at all four sites using autologous tragal perichondrium and preserved scleral graft.Case summary: A 56-year-old woman who underwent cosmetic conjunctivectomy on both eyes 15 years earlier, presented with intermittent eye pain. Examination revealed scleromalacia with calcium plaques in all four nasal and temporal scleral areas. The most extensive avascular area was in the nasal region of the right eye, and the most prominent uveal exposure was in the nasal area of the left eye. Considering the lesion and exposure sizes of the avascular zone and uvea exposure, preserved sclera was transplanted to the temporal and nasal areas of the right eye, while autologous tragal perichondrium was transplanted to the nasal area of the left eye. Tenon's capsule vessels were fixed with pedicle flaps in all four surgical areas for vascularization. Frozen amniotic membrane was transplanted in the nasal area of the left eye, where the conjunctival defect was substantial, and in the lateral area of the left eye, where no graft was used. The conjunctival epithelium was closed using autologous conjunctival flaps in all four areas. Post-surgery, successful engraftment and vascularization of the graft materials were observed in both eyes.
Conclusions
Even with multiple areas of scleromalacia in both eyes, successful results can be achieved during simultaneous surgery if an appropriate graft material is selected and the surgery is performed utilizing principles of tissue restoration.
9.Anterior Segment Swept-Source Optical Coherence Tomography–based Assessment of Corneal Refractive Profiles in Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis Patients: A Controlled Comparative Study
Dong Hee HA ; Seung Hyeun LEE ; Kyoung Woo KIM
Korean Journal of Ophthalmology 2025;39(2):103-113
Purpose:
To analyze anterior, posterior, and total corneal refractive profiles and thickness using anterior segment (AS) sweptsource optical coherence tomography (SS-OCT) in Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN) patients.
Methods:
This retrospective study compared 23 eyes from 14 patients with SJS/TEN with 23 eyes from 14 age- and sexmatched controls. AS SS-OCT measured corneal refractive profiles and pachymetry. Parameters included anterior, posterior, and total corneal power values, posterior to anterior curvature ratio, maximal corneal power, and thickness profiles. The SJS/TEN group was subdivided based on corneal opacity presence (subgroup A) or absence (subgroup B).
Results:
The SJS/TEN group showed significantly higher corneal astigmatism and maximal corneal power values for both anterior and posterior curvatures. Steep total corneal power and total corneal astigmatism were higher in the SJS/TEN group. The thinnest corneal thickness was lower, and its distance from the corneal vertex was greater in the SJS/TEN group. Subgroup analysis revealed that these differences were primarily attributed to the presence of corneal opacity. Additionally, automated keratometry of the anterior corneal surface showed significantly higher values, including steep, flat, and average keratometry and corneal astigmatism, in the SJS/TEN group.
Conclusions
AS SS-OCT shows significant alterations in both anterior and posterior corneal curvatures in patients with SJS/TEN. These findings emphasize the importance of considering posterior corneal curvature changes in pre-cataract surgery assessments and contact lens prescriptions for patients with SJS/TEN.
10.Objective Changes in the Contralateral Eye after Unilateral Cataract Surgery
Seung Hyeun LEE ; Kyoung Woo KIM ; In Ki PARK ; Yeoun Sook CHUN
Korean Journal of Ophthalmology 2025;39(1):48-56
Purpose:
This study evaluated the objective changes in the contralateral eye after unilateral cataract surgery.
Methods:
The study was designed as retrospective observational study. It included 44 patients who underwent unilateral cataract surgery. Collected data were uncorrected and corrected visual acuity, spherical equivalent, intraocular pressure, contrast sensitivity (CS), stereoacuity, and anterior segment optical coherence tomography parameters. Data were collected preoperatively, and 1 week and 1 month postoperatively for each eye.
Results:
Following unilateral cataract surgery, the pupil size of the fellow eye decreased from 3.46 mm to 3.17 mm (postoperative week 1, p = 0.003) and 3.08 mm (postoperative month 1, p < 0.001). Anterior chamber depth of the fellow eye increased significantly from 3.16 mm to 3.27 mm (postoperative week 1, p = 0.005) and 3.26 mm (postoperative month 1, p = 0.001). Uncorrected distance visual acuity (UDVA) of the fellow eye improved significantly at postoperative week 1 (p = 0.042) and postoperative month 1 (p = 0.044). Change of UDVA of the fellow eye at postoperative month 1 was significantly correlated with that of the treated eye (p = 0.039).
Conclusions
Anterior chamber structures changed and UDVA improved in the contralateral eye after unilateral cataract surgery in our cohort. Because fellow eyes were positively affected by monocular cataract surgery, it would be good information if planning for unilateral cataract surgery due to inevitable reasons.

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