Validation and repeatability assessment of the Chinese version of the Ocular Surface Disease Index (OSDI), 5-item dry eye (DEQ-5), and contact lens dry eye questionnaire-8 (CLDEQ-8) questionnaires.

Purpose: This prospective study aimed to validate the translated Chinese versions of the Ocular Surface Disease Index (OSDI), 5-Item Dry Eye (DEQ-5), and Contact Lens Dry Eye Questionnaire-8 (CLDEQ-8) questionnaires and test their repeatability.

Methods: From August 2022 to July 2023, online (qualtrics.com) English and Chinese versions of OSDI, DEQ-5, and CLDEQ-8 questionnaires were distributed to residents of Hong Kong, mainland China, Taiwan, and Singapore ≥ 18 years old who could understand both written Chinese and English.

Ocular surface parameters repeatability and agreement -A comparison between Keratograph 5M and IDRA.

Purpose: To evaluate the repeatability and agreement in dry eye measurements using Oculus Keratograph 5M (K5M) and SBM Sistemi IDRA (IDRA).

Methods: A total of 108 participants were enrolled and 108 eyes were evaluated. Tear meniscus height (TMH) and first and average non-invasive break-up time (NIBUT) were measured using the K5M and IDRA (order randomly assigned).

A cross-sectional study of optometrists' attitudes towards dry eye disease management in Hong Kong: A web-based survey in Hong Kong.

Purpose: This study aimed to explore the practices of optometrists in Hong Kong towards diagnosing and managing dry eye disease (DED).

Methods: From September 2021 to March 2022, an online questionnaire was distributed to optometrists in Hong Kong through several professional associations. The questionnaire included questions about the importance and usefulness of various diagnostic tests, as well as inquiries about management strategies and recommended follow-up schedules for DED.

Characteristics of corneal microcysts in Hong Kong children wearing orthokeratology.

Purpose: To report the characteristics (prevalence, severity, and location) of corneal epithelial microcysts and investigate associated risk factors in children wearing orthokeratology (ortho-k) lenses.

Method: Ninety-five myopic children wearing ortho-k lenses (examined by one of three independent investigators from March to September 2020) were included in this retrospective cross-sectional study. Pertinent data at baseline before ortho-k treatment and at the aftercare visits (the first visit when the microcysts were observed for children with microcysts, and the last visit before October 2020 for children without microcysts) were retrieved and analysed.

Variation of Orthokeratology Lens Treatment Zone (VOLTZ) Study: A 2-year randomised clinical trial.

Purpose: To compare axial elongation (AE) and treatment zone (TZ) characteristics in children wearing 6 mm or 5 mm back optic zone diameter (BOZD) orthokeratology (ortho-k) lenses over 2 years.

Methods: Forty-five (6 to <11 years of age) myopic (-4.00 to -0.

Optical changes and association with axial elongation in children wearing orthokeratology lenses of different back optic zone diameter.

Purpose: To compare changes in ocular aberrations in children wearing orthokeratology (ortho-k) lenses with a back optic zone diameter (BOZD) of 6 mm (6-MM group) or 5 mm (5-MM group) and their associations with axial elongation (AE) over two years.

Methods: Seventy Chinese children, aged 6 to < 11 years, with myopia between - 4.00 to - 0.

Manual and software-based measurements of treatment zone parameters and characteristics in children with slow and fast axial elongation in orthokeratology.

Purpose: To compare the treatment zone (TZ) measurements obtained using manual and software-based methods in orthokeratology (ortho-k) subjects and explore the TZ characteristics of children with slow and fast axial elongation after ortho-k.

Methods: Data from 69 subjects (aged 7 to <13 years old), who participated in three 24-month longitudinal orthokeratology studies, showing fast (>0.27 mm, n = 38) and slow (<0.

Repeatability and reproducibility of manual choroidal thickness measurement using Lenstar images in children before and after orthokeratology treatment.

Purpose: To investigate the repeatability and reproducibility of choroidal thickness measurements using Lenstar images in young myopic children before and after one-month orthokeratology (ortho-k) treatment.

Method: Ocular biometry of 39 subjects were performed using the Lenstar 900. The first five measurements with maximum differences of 0.

One-year results of the Variation of Orthokeratology Lens Treatment Zone (VOLTZ) Study: a prospective randomised clinical trial.

Purpose: To present the 1-year results of the Variation of Orthokeratology Lens Treatment Zone (VOLTZ) Study, which aims to investigate the myopia control effect of orthokeratology (ortho-k) lenses with different back optic zone diameters (BOZD).

Method: Children, aged 6 to <11 years, having myopia -4.00 D to -0.