Acute Intra Ocular Pressure Monitoring After Aflibercept 8mg/0.07mL

In order to reduce the frequency of injections in the so-called sub-optimal patients, a "new generation" anti-VEGF will arrive on the market with higher concentrations of active ingredients with a higher injection volume of 0.07mL (marketing of Aflibercept 8mg/0.07ml in France since 01/06/2025). As IOP peaks are linked to the volume injected, the repercussions of such volumes could probably be higher and require additional procedures. In fact, currently the volumes used (0.05mL) rarely lead to complications such as transient blindness secondary to ocular hypertonia. In this case, an anterior chamber puncture may be necessary. To date, the pressure profile after IVT of 0.07mL is not known, on experimental ocular models, the IOP after an IVT of 0.07mL could reach more than 70mmHg with a return to normal after 20 to 25 minutes. So to evaluate the IOP profile after intravitreal injection of Aflibercept 8mg/0.07mL, the IOP will be monitored after an injection during 45 minutes. IOP will be measure with a Perkins Tonometer in order to have aplanation results. Measures will be done just before and after the injection and at 15minutes, 30 minutes and 45 minutes.

To evaluate the risk of transient monocular blindness, we will note all transient blindness after the injection.

The longer-term repercussions are also not known. Indeed, the repetition of IVT leads to a repetition of IOP peaks in the same patient. The previous studies were all carried out with volumes of 0.05mL and the repercussions with a volume of 0.07mL are therefore not reported in the literature and deserve to be researched. In order to evaluate the repercussion of the new volume, Retinal Nerve Fiber Layer assessed with Optical Coherence tomography will be done just before the injection and at the end of the follow up 12 months +/-2 months.

The treatment regimen will not be modified by the study.

The inclusion visit will be carried out during a routine care consultation. During this consultation, patients will be informed of the research and will be included once their consent has been obtained. The patient's inclusion can take place during the first IVT or during another IVT of the patient's follow-up.

During this visit, the investigator will carry out:

• A papillary OCT before IVT. This is a non-invasive light imaging technique which makes it possible to obtain cross-sectional images of the papilla and to evaluate in particular the therapeutic response to IVT,
• A first measurement of the IOP before injection (T0) by a PERKINS applanation tonometer. It uses an applanation tonometry technique, namely the measurement of IOP by counter pressure on the cornea, after the instillation of anesthetic eye drops.
• Then, injection of Aflibercept 8mg/0.07mL following the usual recommendations of the service,
• and new IOP measurements just after the injection (T1) then at 15 (T15), 30 (T30) and 45 (T45) minutes after the injection.

The consultation will therefore be extended by an additional 45 minutes compared to a traditional consultation. The application of a local anesthetic will also be added by the research to carry out IOP measurements at 30 and 45 minutes (the previous measurements, ie. T1 and T15, will benefit from the local anesthesia of the IVT carried out for current practice).

At the end of this consultation, there will be no change in patient monitoring in terms of frequency of consultations and subsequent injections. IOP measurements will only be taken during the first inclusion consultation.

Patients will perform a new papillary OCT 1 year after the injection where the IOP was monitored, i.e. 1 year after inclusion in the research.

Follow-up for research will end after the papillary OCT at 1 year.

Inclusion criteria

• Patient aged 18 or over;
• Patient with an indication for Aflibercept 8mg/0.07mL (EYLEA 8mg)
• Naive or switched patient, i.e. so-called suboptimal responder to anti-VEGF with high injection frequencies
• Patient with rights to social security
• Having given free and informed consent before any participation in research.

Exclusion criteria

• Pregnant or breastfeeding woman
• Patient under legal protection (guardianship, curatorship, etc.) or legal protection
• Patient with significant astigmatism distorting the IOP values in applanation
• Any other reason that, in the opinion of the investigator, could interfere with the evaluation of the study objectives