Clinical Experience with the Tracey VFA in Brazil

Clinical Experience Clinical Experience with the Tracey VFA with the Tracey VFA

in Brazilin BrazilRenato Ambrósio Jr.Renato Ambrósio Jr.

Universidade de São PauloOftalmologia Instituto

Benjamin Constant

Rio de JaneiroRio de Janeiro

Why should I buy a Why should I buy a wavefront analyzer?wavefront analyzer?

Screening refractive candidatesScreening refractive candidates Patient educationPatient education Surgical PlanningSurgical Planning

R.Ambrósio Jr, M.D.

Goals of the Preop exam in Goals of the Preop exam in refractive surgeryrefractive surgery

Screening refractive candidatesScreening refractive candidates

Complete eye examComplete eye exam Complementary examsComplementary exams Interview with the patientInterview with the patient

R.Ambrósio Jr, M.D.

R.Ambrósio Jr, M.D.

Preop exam in refractive surgeryPreop exam in refractive surgeryWhich exams should we do?Which exams should we do?

0.9% of the candidates had keratoconus 0.9% of the candidates had keratoconus or pellucid marginal degenerationor pellucid marginal degeneration

UW Refractive ClinicUW Refractive Clinic Study Study

R.Ambrósio Jr, M.D.

R.Ambrósio Jr, M.D.

R.Ambrósio Jr, M.D.

CT View – Scales for CT View – Scales for Corneal TopographyCorneal Topography

KERATOMETRY

CORNEAL TOPOGRAPHY

REFRACTION

WAVEFRONT

R.Ambrósio Jr, M.D.

Advantages of Tracey-VFA for Advantages of Tracey-VFA for screening refractive candidatesscreening refractive candidates

Accurate Refraction ~ 0.01 D (vs 0.25D)Accurate Refraction ~ 0.01 D (vs 0.25D) Manifest and Cycloplegia comparisonManifest and Cycloplegia comparison Identification of high risk cases for night Identification of high risk cases for night

vision problems after conventional vision problems after conventional ablations (HOA and Total Aberrations)ablations (HOA and Total Aberrations)

Integrated analysis with Corneal Integrated analysis with Corneal Topography (CTView V.5 software)Topography (CTView V.5 software)

R.Ambrósio Jr, M.D.

Screening refractive candidates with the Tracey VFA – Bad candidate (BSCVA 20/15-2)

PSFPSF Simulation for Patient education Simulation for Patient education

All Aberrations Only HOA

Bad candidate (BSCVA 20/15-2)

Screening refractive candidates with the Tracey VFA

Instituto de Olhos Renato AmbrósioRio de Janeiro

All Aberrations Only HOA

PSFPSF Simulation for Patient education Simulation for Patient education

Qualidade da Visão

R.Ambrósio Jr, M.D.

Integrated Analysis with the CT ViewWF – Topo = Intraocular Optics

Clinical Applications: Monocular Clinical Applications: Monocular Diplopia – Poor CL Fit after PKPDiplopia – Poor CL Fit after PKP

Contact Lens Migrate Inferiorly causing diplopiaContact Lens Migrate Inferiorly causing diplopia

Aplicações do WavefrontAplicações do WavefrontEntendendo as queixas do pacienteEntendendo as queixas do paciente

Importance of ScalesImportance of Scales

Effect of the Scan SizeEffect of the Scan Size

Effect of the Scan SizeEffect of the Scan Size

Instituto de Olhos Renato AmbrósioRio de Janeiro

Irregular eyes measured with Tracey

Instituto de Olhos Renato AmbrósioRio de Janeiro

Irregular eyes measured with Tracey

Validação de Exames que não utilizam Validação de Exames que não utilizam Iluminação InframermelhaIluminação Inframermelha

COLVARD LOW LIGHT vs ADJUSTED AUTO TOPOGRAPHY

2

3

4

5

6

7

8

2 3 4 5 6 7 8

Colvard Low Light Pupil Size (mm)

Ad

just

ed A

uto

To

po

gra

ph

y P

up

il m

easu

rem

ent

(m

m)

r= 0.68

Pupil Measurements with the Tracey VFAPupil Measurements with the Tracey VFA

Instituto de OlhosRenato Ambrósio

Thank you!Thank you!

renatoambrosiojr@terra.com.brrenatoambrosiojr@terra.com.br