Topical and subconjunctival anesthesia versus topical anesthesia alone in patients with senile cataracts undergoing phacoemulsification: a double-blind randomized controlled trail

Status

Active, not recruiting

Phases

Phase 4

Study type

Interventional

Source

TCTR

Registry ID

TCTR20220804003

Enrollment

176

Registered

2022-08-04

Start date

2022-05-30

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

cataract cataract phacoemulsification anesthesia

Interventions

patient receive topical anesthesia and 2% Lidoocaine with adrenaline subconjunctival injection,patient receive topical anesthesia and sham subconjunctival injection

Active Comparator Procedure/Surgery,Placebo Comparator Procedure/Surgery

Topical and subconjunctival anesthesia,Topical anesthesia alone

Eligibility

Sex/Gender

All

Age

40 Years to No maximum

Inclusion criteria

Inclusion criteria: Patient with cataract surgery (Phacoemulsification) at Sawanparcharak Hospital (same surgeon)

Exclusion criteria

Exclusion criteria: 1. cataract patient with Pseudoexfoliation syndrome, lens subluxation, posterior polar cataract, poor pupil dilation or posterior synechiae 2. Any additional operation being performed simultaneously, (e.g., pterygium excision, trabeculectomy, goniosynechialysis, lysis posterior synechiae) 3. Patients with communication difficulties, dementia, mental retardation, deafness 4. Uncooperative patient during slit lamp examination 5. Need for extracapsular cataract extraction or intracapsular cataract extraction 6. Allergy to topical and subconjunctival anesthesia 7. patient with medical conditions or postural deformities preventing appropriate head position while lying on operative table 8. patient refuse to participate in research 9. Neurological problems which impede the surgery, e.g., nystagmus, pakinson

Design outcomes

Primary

Measure	Time frame
Pain score immediate after surgery numeric rating scale	—

Secondary

Measure	Time frame
Patient co- operation during surgery patient co-operative score (assess by surgeon),complications from subconjunctival injection during surgery data extraction from medical record,complications from phacoemulsification during surgery data extraction from medical record,Operative time during surgery (from insert eye speculum to remove eye speculum) data extraction from medical record,Pain score before subconjunctival injection, after subconjunctival injection, 2 hours after surgery, when patient complain about pain and ask for more topical anesthesia during surgery numeric rating scale	—

Measure

Time frame

Patient co- operation during surgery patient co-operative score (assess by surgeon),complications from subconjunctival injection during surgery data extraction from medical record,complications from phacoemulsification during surgery data extraction from medical record,Operative time during surgery (from insert eye speculum to remove eye speculum) data extraction from medical record,Pain score before subconjunctival injection, after subconjunctival injection, 2 hours after surgery, when patient complain about pain and ask for more topical anesthesia during surgery numeric rating scale

—

Countries

Thailand

Contacts

Public ContactWisaruta Wutthayakorn

Sawanpracharak Hospital

wisaruta.spr@cpird.in.th056219888

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026