Gender differences in dry eye disease symptoms associated with psychological health indicators among adults using mobile mental health apps.

Purpose: We aimed to investigate the association between dry eye disease (DED) symptoms and mental health among Korean adults in the community.

Methods: A cross-sectional study analyzed the data of 152 participants using mobile-phone applications for recording mental health. We defined individuals with DED symptoms as those who experienced a sense of irritation or dryness of the eye (either constantly or often).

Sleep disorders, mental health, and dry eye disease in South Korea.

Dry eye disease (DED) is a multifactorial disease of the ocular surface causing severe discomfort, mild ocular irritation, fatigue, pain, visual disturbance, and foreign body sensation. Stress, depression, and sleep disorders are risk factors for DED. We aimed to investigate the association between DED symptoms and composite factors related to mental health (combined sleep duration, psychological stress perception, and history of depressed mood) in Korean adults aged ≥ 20 years in a population-based study using the 2010-2012 Korea National Health and Nutrition Examination Survey data.

Comparison of keratometric measurements between color light-emitting diode topography and Scheimpflug camera.

Background: To determine the agreement of measurements between color light-emitting diode corneal topography (Cassini) and Scheimpflug camera keratometry (Pentacam HR).

Methods: The current retrospective study investigated 117 right eyes of 117 healthy patients before cataract surgery from June 2017 to July 2017. Steep K, flat K, mean K, astigmatism, and axis for both anterior and posterior corneal surface were measured using the two devices.

Accuracy of swept-source optical coherence tomography based biometry for intraocular lens power calculation: a retrospective cross-sectional study.

Background: To evaluate the accuracy of biometric measurements by a swept-source optical coherence tomography (SS-OCT) based biometry for intraocular lens (IOL) power calculation.

Methods: This retrospective observational study enrolled 431 patients undergoing cataract surgery. The charts were reviewed to investigate the failure rate of axial length (AL) measurement of the SS-OCT biometer, partial coherence interferometry (PCI), and A-scan ultrasonography (US) according to cataract type and severity.

Gender-differences in age-related changes of corneal astigmatism in Korean cataract patients.

Background: This cross-sectional study investigated age-related changes in anterior, posterior, and total corneal astigmatism and evaluated sex differences in corneal astigmatism with increasing age in cataract patients.

Methods: This study evaluated eyes with cataracts from May 2009 and July 2013. All eyes underwent a complete ophthalmological examination and corneal Scheimpflug imaging by a Pentacam camera (Oculus, Wetzlar, Germany).

The U-shaped association between self-reported sleep duration and visual impairment in Korean adults: a population-based study.

Objective: This study aimed to investigate the association between self-reported sleep duration and visual impairment (VI) in Korean adults.

Methods: This population-based, cross-sectional study examined ophthalmologic data of 16,374 Koreans aged 19 years and older from the 2010-2012 Korea National Health and Nutrition Examination Survey (KNHNES V). VI data (best-corrected distance visual acuity worse than 0.