Contact Lens Care Research Articles

In Vivo Wettability of HydraGlyde® Silicone Hydrogel Lens With and Without HydraGlyde® Containing Lens Care Solution

Contact lens care solutions are readily available over-the-counter at any pharmacy, optical shop, or eye care specialist centers. The use of a non-compatible solution may damage or alter the material of the contact lens, and may cause changes in the efficiency of the lens, thereby reducing comfort of the wearer. Hence, this research was carried out to determine the wettability of HydraGlyde® Silicone Hydrogel lens with and without HydraGlyde® containing lens care solutions. The right eye of 25 subjects (mean age: 22.8 ± 1.3 years old) were studied. The subjects needed to come for two visits [1 week apart] at approximately the same time of the day. Each subject received the pre-soaked lenses with and without HydraGlyde® Moisture Matrix randomly. The subjects wore the lenses for 8 h. Non-Invasive Tear Breakup Time (NIKBUT) was measured using OCULUS® Keratograph 5M, followed by a subjective questionnaire response.Parametric paired t-test showed no significant differences in PLTF NIKBUT baseline (16.25 ± 3.75 s)and after 8 h of lens wear (15.02 ± 3.81 s) when lenses soaked in a solution with HydraGlyde® Moisture Matrix (p > 0.05). However, a significant difference was found in PLTF NIKBUT baseline (16.16 ± 2.79 s), and after 8 h of lens wear (14.74 ± 3.73 s) when lenses were soaked in a solution without HydraGlyde® Moisture Matrix (p < 0.05). The change in the PLTF NIKBUT baseline and after 8 h of lens wear for the solution with and without HydraGlyde® Moisture Matrix (−1.23 ± 3.89 s and 1.68 ± 3.58 s respectively) were not statistically significant (p > 0.05). The subjective questionnaire revealed a preference towards a solution with HydraGlyde® Moisture Matrix with a mean score of 68.84 ± 15.36% compared to without HydraGlyde® Moisture Matrix with a mean score of 62.80 ± 14.00% (p < 0.05). A lens care solution con-taining HydraGlyde® Moisture Matrix is advised to be prescribed along with HydraGlyde® silicone hydrogel lens to achieve optimum lens performance.

PROFILE OF CONTACT LENS PATIENTS ATTENDING TO BIRATNAGAR EYE HOSPITAL, NEPAL

Background: Contact lens is an artificial device whose front surface substitutes the anterior surface of the cornea. The contact lens can be worn to correct vision or for cosmetic or therapeutic reasons. The objective of the study was to determine the profile of contact lens patients attending Biratnagar Eye Hospital, Nepal. Methods: The hospital-based cross-sectional study was done. All the patients referred to the contact lens clinic of Biratnagar Eye Hospital, Nepal for a contact lens trial were included in this study between 1st January 2016 to 31st December 2019. Data were collected by an optometrist trained in contact lens care and descriptive analysis was performed by using SPSS -17 versions. Results: The mean age (±SD) of the patient was 22.9 (±9.6). Most of them were male 178 (55%) and from India 234 (72%). The majority of patients were in the age between 19 to 40 years 194 (60%). Keratoconus 253 (39%) was the most common ocular disorder found followed by myopia 138 (21%) and astigmatism 56 (9%). Most of the eyes had high refractive errors 287 (44%). Contact lens trial was done in 535 (82%) eyes and it was used for optical correction in 455 (70%) eyes. Rigid Gas Permeable 271 (51%) contact lens was mostly tried followed by soft contact lens 194 (36%). After using a contact lens, 548 (84%) eyes got normal visual acuity. Conclusions: Keratoconus was the most common ocular disorder found followed by myopia and Astigmatism. Rigid Gas Permeable contact lens was mostly prescribed for vision correction. There was a significant improvement in visual acuity after giving contact lenses.

Bacterial isolates and their biofilm formation on contact lenses

Using contact lenses without proper care and sterilization measures can lead to eye infection like keratitis and other eye diseases. About 25-30% of cases with corneal ulcers are related to contacts lens use. Microbial agents after their entry, they further invade into corneal layers by their virulence factors and enzymatics secreted by the bacteria. Wearing contact lenses also increase stress on cornea so the cornea has less ability to defend against the bacteria which is invading. Some of the bacteria are also capable of biofilm formation. Biofilms formed on contact lens surfaces has increased resistance to common steriliants used in contact lens care solution. The main aim of this study is to identify the pathogens that can be grown on the contact lenses and contact lens cases, to identify the production of biofilm by the isolates obtained during this study and to bring awareness about proper sterilization of contact lenses and lens cases during their usage to prevent unnecessary eye infections. This cross sectional study was carried from October 2019 to June 2021 on MBBS and BDS students in Konaseema Institute of Medical Sciences and Research Foundation, who are using contact lenses and who are asymptomatic. Written consent from all students participating in this study was taken. The samples are collected using sterile swabs. Swabs from both the lens and lens cases are taken and immediately cultured and related biochemical tests are done to identify the organism. For the study of biofilm formation, the bacterial isolates obtained from the specimen are inoculated on to commercially available Congo red agar (CRA). The data was processed and arranged into distribution tables and cross tables using statistical package for the social sciences (SPSS) version 21. Total 200 samples were collected and processed for bacterial culture. Among them 145(72.5%) samples showed positive bacterial culures. The most common organisms obtained are which were 30 (20.6%), next common organism isolated were micrococci 24(16.5%), though ASB’s and micrococci are non pathogenic, these were included because the lens and lens cases are preferably to be sterile. The other organisms isolated are 21 (14.4%), 18 (12.4%), 16 (11.04%), 12 (8.2%), 10 (6.9%), 8 (5.5%) and 6 (4.2%). The isolated bacteria are then again streaked on Congo Red Agar to check for the ability of the bacterial isolates to form biofilms. Among 145 bacterial isolates obtained in this study 98 (67.5%) samples showed positive biofilm formation. The micro organisms can lodge in most of the contact lenses and contact lens cases… which in turn enter into eye due to improper sterilization of lens and lens cases. And most of the bacterial isolates obtained from these contact lenses and contact lens cases are capable of production of biofilm. To avoid infections caused by contact lens users the care of both the contact lenses and lens cases is very important.

Identification Of Acanthamoeba spp. In Used Contact Lens Solution

Contact lenses are the most popular devices used by many people around the world for vision correction, aesthetics, and therapeutic purposes. Poor contact lens hygiene can cause various complications. One of the concerns regarding the use of contact lenses is the presence of Acanthamoeba spp. Acanthamoeba spp. is a free-living amoeba that can be found in many places including untreated fresh water, treated fresh water and unconventional water sources. One of the complications caused by Acanthamoeba spp. is Acanthamoeba keratitis which is an eye infection that is often caused by the use of contact lenses and contaminated contact lens solutions. Objective. The purpose of this study is to determine the description of Acanthamoeba spp. found in contact lens solution and contact lens care of Universitas Sumatera Utara students. Method. This study used univariate analysis. Data were obtained from the results of contact lens solution examination and questionnaire interviews. Result. Most of the samples (98%) did not have Acanthamoeba spp. Some respondents (60.8%) had fairly clean contact lens care behaviour and the rest (39.2%) had very clean contact lens care behaviour. Conclusion. One sample was found positive with Acanthamoeba spp. The positive sample had Acanthamoeba spp. cyst. Contact lens care was generally done well.

PENTINGNYA PENGETAHUAN PERAWATAN LENSA KONTAK LUNAK BAGI PEMAKAI DI OPTIK CITRA PADANG

This scientific paper discusses the importance of soft contact lens care knowledge for users in Padang Citra Optics. This study aims to determine: Knowledge, care for users, the use , the impact of wearing and maintaining soft contact and also handling of the use and maintenance of soft contact lenses at Optik Citra Padang. This research design uses descriptive quantitative method. The population in this study was all patients wearing soft contact lenses at Optik Citra Padang in the period 15 July 2021-15 August 2021. Data were collected through questionnaires and research instruments using a Check List. The results showed that the respondents did not fully know the proper and correct care of soft contact lenses, this was seen as many as 24 respondents (53%) knew the correct soft contact lens care procedure and as many as 21 respondents (47%) did not know the treatment procedures. correct soft contact lenses, 21 respondents (47%) understand how to properly put on and remove soft contact lenses and 24 respondents (53%) do not understand how to properly install soft contact lenses, 20 respondents (44.40%) know about the impact of wearing and maintaining soft contact lenses that are not up to standard and as many as 25 respondents (55.60) do not know about the impact of wearing and maintaining soft contact lenses that are not up to standard, 14 respondents (31%) know how to handle the use and care of soft contact lenses and 31 respondents (69%) do not know how to handle from wearing soft contact lenses. There are several suggestionsFor RO to provide information to, For opticians, it is recommended to improve the quality of eye health services to the public, for academies, it is recommended to improve the quality of education. (4) For the public, it is recommended that when wearing and caring for contact lenses, more attention should be paid to use and care for them properly so as not to cause an impact on eye health.Keywords Soft Contact Lens, Wearers, Optics.

Edge design and Contact Lens Care Solutions influence in contact lenses wear

Purpose: The purpose of this study was to evaluate the impact of edge design and contact lens care solutions (CLCS) in comfort, vision, fitting and ocular health on contact lenses (CLs) wear.

Evaluation of Antimicrobial Efficacy of Non-Preserved Multipurpose Solutions in the Presence of Contact Lenses

Purpose: Non-Preserved Multipurpose solutions (MPS) contact lens care products (CLC) offer intrinsic disinfection efficacy against microorganisms. Few studies have evaluated the efficacy of these products in the presence of contact lenses. ISO 18259 addresses biocide uptake into contact lenses for preserved MPS products, which reduces their efficacy. In this study, we evaluated the disinfection efficacy of products containing either hydrogen peroxide or povidone iodide in the presence of contact lenses against two strains of Acanthamoeba trophozoites and cysts.

Self-assembly and cleaning and wettability of a polysaccharide-surfactant system formed from the cationic hydroxypropyltrimethyl ammonium chloride chitosan and nonionic sucrose lauric acid ester

Contact lens care solution was prepared via hydroxypropyltrimethyl ammonium chloride chitosan (HACC) and sucrose lauric acid ester (SML) via self-assembly in borate buffer solution (BBS). The elution efficiency of lipids, micellization, and wettability properties of HACC-SML in BBS was studied systematically using high-performance liquid chromatography (HPLC), dynamic light scattering (DLS), zeta potential, surface tension, and contact angles methodologies. The elution efficiency of the lipid increased from 46.98% to 65.68%, whereas DLS and zeta potential data varied with the addition of SML. These caused the shrinkage of micelles, and the system became stable, and further revealed that SML was a non-ionic biosurfactant with excellent performance. The result of surface tension at water-air and contact angles on silicone hydrogel lens at 25 °C showed that SML has outstanding adsorption capacity with an increased degree of wetting, ensuring the comfort and safety of wearing.

Compliance with contact lens care and factors driving noncompliance in health-care students in Jeddah, Saudi Arabia.

PURPOSE:This study aimed to assess compliance to contact lens care behaviors and determine common factors influencing noncompliance among a population of university students in Jeddah, Saudi Arabia.METHODS:This is an observational, cross-sectional study in which a previously validated self-administered questionnaire consisting of 12 questions addressing compliance to contact lens wear and care was E-mailed through the university message center.RESULTS:A total of 388 participants completed the questionnaire. Of those who completed the survey, 150 were contact lens users with an experience of 1 month or more. The average compliance rate to contact lens care was around 66%. High levels of compliance were reported in sharing contact lenses, sleeping with contact lenses, showering/swimming with contact lenses, and using water to clean contact lenses. Moderate levels of compliance were shown in overuse of contact lenses, adherence to instructions of lens cleaning, cleaning the lens case, and adherence to aftercare visits. The lowest levels of compliance were noted in washing hands before lens use and lens case replacement. Gender, smoking, contact lens experience, type and modality of contact lens usage, and contact lens purchase site were found to have a significant association with behaviors showing poor compliance. Believing there is no harm in wearing lenses for longer than the recommended replacement schedule was the primary reason given for overusing contact lenses.CONCLUSION:Moderate levels of compliance were generally reported by respondents, necessitating the need for better strategies to reinforce the importance of compliance to contact lens care in the Saudi population.

Effectiveness of an Online Educational Video Intervention to Improve the Knowledge and Behavior of Contact Lens Care During the COVID-19 Pandemic: A Pre-Test/Post-Test Design

Effectiveness of an Online Educational Video Intervention to Improve the Knowledge and Behavior of Contact Lens Care During the COVID-19 Pandemic: A Pre-Test/Post-Test Design

Perception of Soft Contact Lens Usage among Health Sciences and Business Management Students

The knowledge and awareness on contact lens care can enhance the positive attitude of the wearers and reduce related complications. This study aimed to investigate the perceptions of contact lens use and care of university students with different backgrounds. A questionnaire regarding the perception and practice of contact lens use was online distributed. The perception of contact lens use as an optical device between spectacle and contact lens was statistically significant (p<0.05). However, there was no significant difference between the perception and awareness of two groups (p>0.05). Regardless of educational field background, all contact lens wearers have the same behavioural assessment of contact lens awareness. Keywords: behaviour, contact lens usage, knowledge, awareness. eISSN: 2398-4287© 2021. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians/Africans/Arabians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. DOI: https://doi.org/10.21834/ebpj.v6i18.3058

Contact Lens Solutions Toxicity Evaluation by the Bioluminescence Method

Purpose. To study the possibility of using bioluminescence biotesting to evaluate the toxicity of contact lens care solutions.Methods. The examined solutions were tested both immediately upon unpacking (i.e. sterile) and after rinsing “Pure Vision 2” lenses in them (i.e. after use). As a test system, NADH:FMN oxidoreductase and luciferase bacterial bio enzyme system was used. It contained lyophilized highly purified ferments of EC 1.14.14.3 bacterial luciferase (0.4 mg/ml) from E.coli recombinant variant and EC 1.5.1.29 NADH:FMN oxidoreductase (Ph. leiognathi) (0.18 enzyme units). The bioluminescent testing was carried out with TriStar LB 941 microplate luminometer (Germany). The measurement of the luminescence intensity was carried out in two repetitions. Residual luminescence (T, %), calculated as the ratio of the average maximum luminescence intensities of the experimental measurement (solution) and the control measurement, multiplied by 100%, was used as an integral indicator. Results. The results of bioluminescent testing of sterile solutions showed that “Maxima” solution exhibited the greatest inhibition of bioluminescence, while “Optimed” (Russia) and “AVIZOR Aqua Soft Comfort” solutions demonstrated the least effect. “Bausch + Lomb Biotrue” solution did not affect the bioluminescence. The results of bioluminescence testing of the solutions after contact lenses that had previously been worn for 10 hours were stored in them, showed a strong inhibition of bioluminescence in all solutions. Conclusion. The results of the toxicity evaluation allow for a more reliable prognosis of the long-term consequences of using certain solutions by contact lens wearers from risk groups. The findings also provide more insight into the mechanisms of development of discomfort and other reasons for refusing to wear lenses, as well as to suggest more effective prevention measures.

Transparent and photochromic poly(hydroxyethyl acrylate–acrylamide)/WO3 hydrogel with antibacterial properties against bacterial keratitis in contact lens

AbstractThere have been numerous challenges in the incorporation of photochromic materials into hydrogel system due to the agglomeration of nanoparticles and non‐transparency of the hydrogel material. In this study, WO3 nanocomposites were prepared and incorporated into poly(hydroxyethyl acrylate) (pHEA) and polyacrylamide (pAAm) to fabricate poly(HEA‐AAm)/WO3 hydrogels with improved coloration efficiency and reversibility. The as‐prepared p(HEA‐AAm)/WO3 hydrogel displayed remarkable mechanical properties to sustain compressive and tensile stress up to 15.9 and 58.7 MPa with deformation ratios of 16.2 and 30.8, respectively. The hydrogels exhibited good transmittance (%T) and reflectance (%R) of ~47% and 64% at 829 and 408 nm respectively. The hydrogels also revealed visible spectroscopic absorbance at >781 nm after exposure to UV‐lamp and natural sunlight for 5 s and 0.5 h, giving rise to a blue coloration, however, the fading process of the hydrogels was achieved in 20 min and 2.0 h respectively in an open air. More so, the hydrogel solutions displayed a high antibacterial efficacy against bacteria pathogens associated with bacterial keratitis in contact lens care solutions. The observed excellent photochromic and antibacterial properties of the hydrogel show promising potentials for use in the construction of antibacterial contact lenses, optical and intelligent devices.

Differential Antimicrobial Efficacy of Multipurpose Solutions against Acanthamoeba Trophozoites.

SIGNIFICANCEThis investigation examines the effectiveness of several common contact lens solutions in the disinfection of Acanthamoeba, which causes a serious eye infection most often resulting from dysfunctional or improper use of contact lens products.PURPOSEAcanthamoeba keratitis is an eye infection caused by a free-living amoeba, which can lead to extensive corneal damage and frequently blindness. Acanthamoeba keratitis is linked with contact lens use combined with noncompliance with contact lens care cleaning regimens. The patient's choice and use of multipurpose solutions (MPSs) continue to be a risk factor for Acanthamoeba keratitis. Thus, it is critical that the Acanthamoeba disinfection efficacy of the popular MPSs be determined. Here we compare the efficacy of seven major MPSs on the global market.METHODSUsing standard methods of Acanthamoeba disinfection and quantification, Acanthamoeba ATCC 30461, 30868, 50370, and 50676 trophozoites were inoculated into each MPS and held for the manufacturer's recommended disinfection time. Acanthamoeba recovery plates were incubated for 14 days, after which positive wells were identified and cell concentrations determined using the 50% endpoint method.RESULTSMembers of the OPTI-FREE products (Express, Replenish, and Puremoist [Alcon, Fort Worth, TX]) demonstrated significantly higher percentages of antimicrobial activity compared with the renu Advanced Formula (Bausch + Lomb, Rochester, NY), Biotrue (Bausch + Lomb), Acuvue RevitaLens (Johnson & Johnson, Santa Ana, CA), and Lite products (Cooper Vision, Scottsville, NY) for four of the trophozoite strains tested.CONCLUSIONSMany of the popular MPS biocides maintain little or no antimicrobial activity against Acanthamoeba trophozoites, and the number of biocides in an MPS does not necessarily indicate its antimicrobial activity.

"Common Ophthalmic Preservatives in Soft Contact Lens Care Products: Benefits, Complications, and a Comparison to Non-Preserved Solutions" [Response to Letter

Response to Letter in regards to Letter to the Editor Concerning “Common Ophthalmic Preservatives in Soft Contact Lens Care Products: Benefits, Complications, and a Comparison to Non-Preserved Solutions” [Letter]

Letter to the Editor Concerning "Common Ophthalmic Preservatives in Soft Contact Lens Care Products: Benefits, Complications, and a Comparison to Non-Preserved Solutions" [Letter

Letter to the Editor Concerning "Common Ophthalmic Preservatives in Soft Contact Lens Care Products: Benefits, Complications, and a Comparison to Non-Preserved Solutions" [Letter

Common Ophthalmic Preservatives in Soft Contact Lens Care Products: Benefits, Complications, and a Comparison to Non-Preserved Solutions.

PurposePreservatives are essential for preventing contact lens (CL)-related microbial keratitis (MK). The purpose of this review is to summarize the current knowledge related to the use of common ophthalmic preservatives in CL care products with respect to both safety and efficacy.MethodsManuscripts written in English were obtained by searching PubMed.gov with the term contact lens plus antimicrobial, benzalkonium chloride, biguanide, Aldox, polyquaternium, preservative, thimerosal, EDTA (ethylenediaminetetraacetic acid), chlorhexidine, or blister pack.ResultsThis review found that first-generation preservatives are no longer used in CL multipurpose solutions (MPS) due to their high levels of ocular toxicity. Modern, high-molecular-weight preservatives, including polyquaternium-1 (PQ-1) and biguanides (PHMB), are generally effective against bacteria, minimally effective against fungi, and not effective against Acanthamoeba. PQ-1 and PHMB are likely safe when used with CLs, but they may cause ocular adverse events, with roughly equal risk between the two preservatives. Some CL MPS contain both PQ-1 and PHMB, but no increased risk of adverse events has been reported when combining the two. Hydrogen-peroxide (H2O2) solutions are effective against all common ocular microbes, including Acanthamoeba, and they have been proven safe with proper compliance. Povidone-iodine (P-I) solutions are not currently commercially available in North America, but they have been shown in other countries to be safe and effective.ConclusionPatients should be monitored when using PQ-1 or PHMB-containing solutions since they have been associated with ocular adverse events. If events are detected, patients should be switched to an alternative solution. H2O2 or P-I solutions are preferred for any patient who may expose their CLs to water because they are the only solution categories effective against Acanthamoeba.

Continuous Real-Time Motility Analysis of Acanthamoeba Reveals Sustained Movement in Absence of Nutrients.

Acanthamoeba keratitis is a serious ocular infection which is challenging to treat and can lead to blindness. While this pathogen is ubiquitous and can contaminate contact lenses after contact with water, its habits remain elusive. Understanding this organism’s natural behavior will better inform us on how Acanthamoeba colonize contact lens care systems. Acanthamoeba trophozoites were allowed to adhere to either a glass coverslip or non-nutrient agar (NNA) within a flow cell with nutrients (Escherichia coli or an axenic culture medium (AC6)) or without nutrients (Ringer’s solution). Images were taken once every 24 s over 12 h and compiled, and videos were analyzed using ImageJ Trackmate software. Acanthamoeba maintained continuous movement for the entire 12 h period. ATCC 50370 had limited differences between conditions and surfaces throughout the experiment. Nutrient differences had a noticeable impact for ATCC 30461, where E. coli resulted in the highest total distance and speed during the early periods of the experiment but had the lowest total distance and speed by 12 h. The Ringer’s and AC6 conditions were the most similar between strains, while Acanthamoeba in the E. coli and NNA conditions demonstrated significant differences between strains (p < 0.05). These results indicate that quantifiable visual tracking of Acanthamoeba may be a novel and robust method for identifying the movement of Acanthamoeba in relation to contact lens care products. The present study indicates that Acanthamoeba can undertake sustained movement for at least 12 h with and without nutrients, on both rough and smooth surfaces, and that different strains have divergent behavior.

Regular soft contact lens wearers’ comprehension of graphical symbols labelled on multipurpose solutions

ABSTRACT Clinical relevance Symbols are commonly used to represent information of health care products included multipurpose solutions (MPSs) for contact lens (CL) care. Background Little knowledge is available about recognition and comprehension by regular soft CL wearers of commonly used symbols in the instructions of CL MPSs marketed worldwide. Methods CL wearers from the UK and Spain were invited to answer an anonymous on-line questionnaire (distributed though Facebook and Twitter) concerning the recognition and comprehension of seven common symbols (ISO 15223:2017 and EN 980:2008) included in MPS package instructions. Results Answers of one hundred-ten soft CL wearers who use MPS (27 in the UK and 83 in Spain) were analysed showing low recognition and comprehension of the surveyed symbols even in wearers with > 5 years of CL wear (71.8%). The CE marked was the most recognised (96% in the UK and 88% in Spain, P = 0.29) and understood (78% in the UK and 85% in Spain, P = 0.25) symbol, but other important symbols, such as ‘Caution’ and ‘Do not reuse’, were under recognised (22% in the UK and 19% in Spain, P = 0.78 and 11% in the UK and 6% in Spain, P = 0.40 respectively) and understood (close to 30% in both countries P > 0.15). Participants with > 5 years of experience, showed slightly higher comprehension (P < 0.05) in some symbols (‘Sterilised’; ‘Do not reuse’; ‘Use by date’ and ‘CE marked’). Conclusion These results suggest an insufficient comprehension of seven common symbols included in MPS instructions among regular CL wearers in the UK and Spain without high impact of CL wear experience. Improving the education and symbol comprehension of regular CL wearers could help to get better patients’ behaviour and safe use of MPS in soft CLs care.

The Relationship of Knowledge Level of Installation and Maintenance with the Successful Use of Soft Contact Lens in Myopia patients

Background: Refractive errors have occurred in many parts of the world, including in Indonesia, with different types of abnormalities, one of which is myopia which can be corrected with glasses and spherical contact lenses. Aim: To determine the relationship between the level of knowledge of the installation and care of soft contact lenses in myopic patients. Methods: This research method is Cross Sectional at Optik Metro, the number of samples is the total population, the research instrument is a questionnaire, the independent variable of this research is the level of knowledge while the dependent variable is the attitude and behavior of Care and Installation with Successful Use of Contact Lenses. This research has been approved by the Widya Husada STIKES Ethics Commission. Results: The results of the study based on the number of sufferers and the distribution of refractive errors at Optik Metro from March 15-20, 2021, showed that the number of myopia patients who came was 13.0% with the type of treatment using soft contact lenses as much as 2.2%. There is a relationship between knowledge and attitudes of respondents with maintenance and installation behavior with successful use of LK with a significance value of 0.000 (p &lt; 0.05). Conclusion: It was concluded that the toric soft contact lens installation procedure was carried out in the right way by taking into account a good fitting assessment. It is necessary to provide education to increase knowledge and education on Care and Installation of Contact Lenses for all customers. Keywords: Knowledge, Attitude, Soft LK, Myopia