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Does offering only the spherical contact lens trial to the low astigmats mislead the practitioners?

International Journal of Ophthalmology(English edition) 2021年第8期14卷 1281-1284页

作者： Monica Chaudhry Surendra Prasad Sah Indra Prasad Sharma Soujanya Mondal Department of Optometry and Vision Science Amity UniversityHaryana 122003India School of Health Sciences Ansal UniversityGurugramHaryana 122003India Himalaya eye Hospital GharinpatanPokhara 00977Nepal Gyalyum Kesang Choeden Wangchuck National eye Center JDW National Referral HospitalThimphu 11001Bhutan optsight eye care HCB RoadAmulapattiNear MFCSivasagarAssam 785640India

AIM:To compare the visual acuity(VA),comfort,and patient preference in a soft toric contact lens(TCL)versus soft spherical contact lens(SCL)in low astigmatic subjects during the contact lens(CL)***:This subject-masked,block randomized,2×2 crossover study recruited 40 neophyte subjects(80 eyes)aged 18 to 33 y with astigmatism in the range of 0.75-1.25 D with or without spherical power from-6.00 D to+6.00 *** participants were scheduled for two days CL trial and were fitted with the best-fit SCL and *** 4 h of wear,they were assessed objectively for high contrast VA and subjective vision,comfort,and ***:The responses of 36 subjects(response rate 90%)with a mean age of 23.02±2.97 y(range 18 to 33 y)were ***-line improvement of monocular VA in the logMAR chart was reported to TCL as compared to SCL(-0.044±0.06 vs 0.04±0.03 logMAR,P=0.01)but the binocular vision remained similar(-0.12±0.07 vs-0.14±0.04 logMAR,P=0.38).Subjects felt a noticeable difference in clarity when shifted to TCL as compared to the *** satisfaction with vision(vision quality)was significantly better with TCL(P=0.03).The fatigue with TCL was graded less at 2.5±0.6,compared to SCL at 4.6±1.3(P=0.04).Thirty-three participants(91.6%)preferred to use contact lens of which 26 participants(79%)preferred ***:The findings suggest that VA and comfort are better with TCL as compared to SCL which is only observed if the patient was offered both offering SCL with spherical equivalent power alone as the first option can mislead the practitioner;TCL trial should be the first choice of the lens in low-to-moderate astigmatism.

关键词： astigmatism comfort spherical contact lens toric contact lens visual acuity

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