Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass users
Background: “Presbyopia” is the most common age-related condition of progressive loss of accommodative ability, typically occurs around the fourth decade of life. Accommodative convergence (AC) and accommodation facility (AF) are essential for near vision and play a significant role in presbyopia. O...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2025-01-01
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| Series: | Journal of Clinical Ophthalmology and Research |
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| Online Access: | https://journals.lww.com/10.4103/jcor.jcor_128_24 |
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| author | Amit Kumar Jain Suman Rajpoot Vandana Batham Praveen Kumar Singh Neeraj Singh Rajput Nirmala Rajput |
| author_facet | Amit Kumar Jain Suman Rajpoot Vandana Batham Praveen Kumar Singh Neeraj Singh Rajput Nirmala Rajput |
| author_sort | Amit Kumar Jain |
| collection | DOAJ |
| description | Background:
“Presbyopia” is the most common age-related condition of progressive loss of accommodative ability, typically occurs around the fourth decade of life. Accommodative convergence (AC) and accommodation facility (AF) are essential for near vision and play a significant role in presbyopia.
Objectives:
The study aim was to evaluate the influences of Accommodative convergence/accommodation (AC/A) ratio and binocular AF for near vision in presbyopics, by comparing near-glass users and nonglass users.
Materials and Methods:
This cross-sectional, comparative study included 192 patients aged between 38 and 48 years, with 96 patients each in Group A (glass users) and Group B (nonglass users). Distance and near visual acuity were measured using Snellen’s and Jaeger’s charts, respectively. AC/A ratio and binocular AF were assessed by heterophoria method and manual flipper (+2.00/−2.00D lenses), respectively. Statistical analysis was done by SPSS software.
Results:
Mean ± standard deviation age in glass users and nonglass users was 42.41 ± 2.77 and 43.06 ± 2.98 years, respectively; whereas the mean AC/A ratio was 4.07∆D and 3.91∆D, respectively; P = 0.020. The mean binocular AF for distance in glass users and nonglass users was 16.70D and 13.97D, respectively; P = 0.000. Mean binocular AF for near in glass users and nonglass users was 13.72D and 14.00D, respectively, with P = 0.241.
Conclusions:
Our study concludes that wearing of near glasses in presbyopic individuals was associated with a higher deviation of eyes for distance and AC/A ratio with better distance binocular AF; however, wearing of near glasses does not seem to significantly affect the deviation of eyes for near or binocular AF for near objects. |
| format | Article |
| id | doaj-art-bff2ebc13410487badb8d5c6c7dd48cd |
| institution | Kabale University |
| issn | 2320-3897 2320-3900 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Journal of Clinical Ophthalmology and Research |
| spelling | doaj-art-bff2ebc13410487badb8d5c6c7dd48cd2025-02-06T06:38:52ZengWolters Kluwer Medknow PublicationsJournal of Clinical Ophthalmology and Research2320-38972320-39002025-01-01131717710.4103/jcor.jcor_128_24Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass usersAmit Kumar JainSuman RajpootVandana BathamPraveen Kumar SinghNeeraj Singh RajputNirmala RajputBackground: “Presbyopia” is the most common age-related condition of progressive loss of accommodative ability, typically occurs around the fourth decade of life. Accommodative convergence (AC) and accommodation facility (AF) are essential for near vision and play a significant role in presbyopia. Objectives: The study aim was to evaluate the influences of Accommodative convergence/accommodation (AC/A) ratio and binocular AF for near vision in presbyopics, by comparing near-glass users and nonglass users. Materials and Methods: This cross-sectional, comparative study included 192 patients aged between 38 and 48 years, with 96 patients each in Group A (glass users) and Group B (nonglass users). Distance and near visual acuity were measured using Snellen’s and Jaeger’s charts, respectively. AC/A ratio and binocular AF were assessed by heterophoria method and manual flipper (+2.00/−2.00D lenses), respectively. Statistical analysis was done by SPSS software. Results: Mean ± standard deviation age in glass users and nonglass users was 42.41 ± 2.77 and 43.06 ± 2.98 years, respectively; whereas the mean AC/A ratio was 4.07∆D and 3.91∆D, respectively; P = 0.020. The mean binocular AF for distance in glass users and nonglass users was 16.70D and 13.97D, respectively; P = 0.000. Mean binocular AF for near in glass users and nonglass users was 13.72D and 14.00D, respectively, with P = 0.241. Conclusions: Our study concludes that wearing of near glasses in presbyopic individuals was associated with a higher deviation of eyes for distance and AC/A ratio with better distance binocular AF; however, wearing of near glasses does not seem to significantly affect the deviation of eyes for near or binocular AF for near objects.https://journals.lww.com/10.4103/jcor.jcor_128_24ac/a ratioaccommodative convergenceaccommodation facilityglass usersnonglass userspresbyopia |
| spellingShingle | Amit Kumar Jain Suman Rajpoot Vandana Batham Praveen Kumar Singh Neeraj Singh Rajput Nirmala Rajput Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass users Journal of Clinical Ophthalmology and Research ac/a ratio accommodative convergence accommodation facility glass users nonglass users presbyopia |
| title | Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass users |
| title_full | Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass users |
| title_fullStr | Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass users |
| title_full_unstemmed | Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass users |
| title_short | Influences of AC/A ratio and accommodation facility on near vision in presbyopic individuals: A prospective study done on North Indian population by comparing the presbyopic glass users with nonglass users |
| title_sort | influences of ac a ratio and accommodation facility on near vision in presbyopic individuals a prospective study done on north indian population by comparing the presbyopic glass users with nonglass users |
| topic | ac/a ratio accommodative convergence accommodation facility glass users nonglass users presbyopia |
| url | https://journals.lww.com/10.4103/jcor.jcor_128_24 |
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