Therapeutic effects of orthokeratology lens combined with 0.01% atropine eye drops on juvenile myopia.

PURPOSE: To explore the therapeutic effects of orthokeratology lens combined with 0.01% atropine eye drops on juvenile myopia. METHODS: A total of 340 patients with juvenile myopia (340 eyes) treated from 2018 to December 2020 were divided into the control group (170 cases with 170 eyes, orthokeratology lens) and observation group (170 cases with 170 eyes, orthokeratology lens combined with 0.01% atropine eye drops). The best-corrected distance visual acuity, best-corrected near visual acuity, diopter, axial length, amplitude of accommodation, bright pupil diameter, dark pupil diameter, tear-film lipid layer thickness, and tear break-up time were measured before treatment and after 1 year of treatment. The incidence of adverse reactions was observed. RESULTS: Compared with the values before treatment, the spherical equivalent degree was significantly improved by 0.22 (0.06, 0.55) D and 0.40 (0.15, 0.72) D in the observation and control groups after the treatment, respectively (p<0.01). After the treatment, the axial length was significantly increased by (0.15 ± 0.12) mm and (0.24 ± 0.11) mm in the observation and control groups, respectively, (p<0.01). After the treatment, the amplitude of accommodation significantly declined in the observation group and was lower than that in the control group, whereas both bright and dark pupil diameters significantly increase and were larger than those in the control group (p<0.01). After the treatment, the tear-film lipid layer thickness and tear break-up time significantly declined in the two groups (p<0.01). CONCLUSIONS: Orthokeratology lens combined with 0.01% atropine eye drops can synergistically enhance the control effect on juvenile myopia with high safety.

Principales métodos para el cálculo de la lente intraocular después de la cirugía refractiva corneal / Fundamental methods for calculation of intraocular lens after corneal refractive surgery

Con el surgimiento y el desarrollo de la cirugía refractiva corneal se han podido corregir quirúrgicamente a millones de pacientes con defectos refractivos. Con el cursar de los años comienza a opacarse fisiológicamente el cristalino, y disminuye la agudeza visual en estos pacientes a quienes se les modificó la curvatura corneal. Ante la necesidad de remover el cristalino y de calcular una lente intraocular de potencia adecuada para conseguir la emetropía, surge un nuevo reto a la Oftalmología. El cálculo de la lente intraocular en pacientes con cirugía refractiva corneal es mucho más complejo, pues además de tener longitudes axiales extremas, se añaden factores por la intervención previa que alteran la predictibilidad del resultado visual, con la aplicación de las fórmulas de cálculo de lente intraocular existentes. Se han descrito varios métodos que permiten determinar correctamente la potencia de la lente a implantar, dependiendo de los datos de los que se dispongan; de ahí la motivación para realizar una revisión de diferentes publicaciones con el propósito de describir los principales métodos empleados para realizar el cálculo de la lente intraocular en estos pacientes. Se utilizó la plataforma Infomed, específicamente la Biblioteca Virtual de Salud, con todos sus buscadores(AU)

With the emergence and development of the corneal refractive surgery, the refractive defects of millions of patients have been surgically corrected. As time goes by, the physiological opacification of the crystalline lens begins, thus reducing the visual acuity of those patients whose corneal curvature has been modified. Should the crystalline lens be modified and should the intraocular lens power be adequately calculated to achieve emetropia, ophthalmology faces then a new challenge. The intraocular lens calculation in patients with corneal refractive surgery is much more complex since, in addition to extreme axial lengths, there are factors derived from the previous surgery that alter predictability of the visual result, with the use of existing intraocular lens calculation formulae. Several methods have been so far described, which allow correctly determining the lens power to be implanted, depending on available data. This was the main reason for making a review of different publications to describe the main methods for intraocular lens calculation in these patients. Infomed platform, mainly the virtual library of health, was used with all its searchers(AU)

Principales métodos para el cálculo de la lente intraocular después de la cirugía refractiva corneal / Fundamental methods for calculation of intraocular lens after corneal refractive surgery

Con el surgimiento y el desarrollo de la cirugía refractiva corneal se han podido corregir quirúrgicamente a millones de pacientes con defectos refractivos. Con el cursar de los años comienza a opacarse fisiológicamente el cristalino, y disminuye la agudeza visual en estos pacientes a quienes se les modificó la curvatura corneal. Ante la necesidad de remover el cristalino y de calcular una lente intraocular de potencia adecuada para conseguir la emetropía, surge un nuevo reto a la Oftalmología. El cálculo de la lente intraocular en pacientes con cirugía refractiva corneal es mucho más complejo, pues además de tener longitudes axiales extremas, se añaden factores por la intervención previa que alteran la predictibilidad del resultado visual, con la aplicación de las fórmulas de cálculo de lente intraocular existentes. Se han descrito varios métodos que permiten determinar correctamente la potencia de la lente a implantar, dependiendo de los datos de los que se dispongan; de ahí la motivación para realizar una revisión de diferentes publicaciones con el propósito de describir los principales métodos empleados para realizar el cálculo de la lente intraocular en estos pacientes. Se utilizó la plataforma Infomed, específicamente la Biblioteca Virtual de Salud, con todos sus buscadores(AU)

With the emergence and development of the corneal refractive surgery, the refractive defects of millions of patients have been surgically corrected. As time goes by, the physiological opacification of the crystalline lens begins, thus reducing the visual acuity of those patients whose corneal curvature has been modified. Should the crystalline lens be modified and should the intraocular lens power be adequately calculated to achieve emetropia, ophthalmology faces then a new challenge. The intraocular lens calculation in patients with corneal refractive surgery is much more complex since, in addition to extreme axial lengths, there are factors derived from the previous surgery that alter predictability of the visual result, with the use of existing intraocular lens calculation formulae. Several methods have been so far described, which allow correctly determining the lens power to be implanted, depending on available data. This was the main reason for making a review of different publications to describe the main methods for intraocular lens calculation in these patients. Infomed platform, mainly the virtual library of health, was used with all its searchers(AU)

Success Rate of Incorporating Corneal Refractive Therapy into 3 Different Ophthalmology Practices.

OBJECTIVE: The purpose of the study was to evaluate the efficacy of orthokeratology in correcting myopia. METHODS: The study took place over three ophthalmology practices, which were trained in fitting corneal reshaping therapy lenses. The patients' age ranged from 9 to 59 years. The patients were split into 5 groups: 9 to 13, 14 to 21, 22 to 37, 38 to 42, 43 to 48, and 49 to 59 years. There were a total of 260 eyes being tested and the manifest refraction ranged from -0.25 diopters (D) to -7.75 D with astigmatism up to 1.50 D. Patients were fit using a calculator slide rule program and also by a diagnostic lens set. RESULTS: The patient's uncorrected visual acuity (UCVA) was improved with 99% achieving visual acuities better than 20/40 and 85% achieved 20/20. There were no significant differences between UCVA of left and right eyes in patients who received bilateral correction (P>0.05). The study showed that women respond to the therapy better than men. The average difference from the target UCVA for women was 0.24, whereas men were off by an average of 0.34 (P<0.05). Only 2 patients, 1 in the 9 to 13 age group and 1 in the 37 to 43 age group did not respond to the therapy. CONCLUSION: Orthokeratology is an effective method to correct myopia. Only 1.4% of patients were unresponsive to the correction. There is no difference in the effectiveness of orthokeratology in the right and left eyes, but it does seem to be more effective in women compared with men.