Study: NCT05626517

Intervention type: DIAGNOSTIC_TEST
Intervention: Ocular Imaging
Description: The retinal photography will be acquired from macula-centre and an optic-disc centre for both left and right eye after their cardiac assessment. Patient will be required to focus at a target inside the machine for approximately 5 to 10 seconds, with a flash followed at the end when eye image is captured. Based on patients' eye conditions, additional or less images may be taken. This allows a snapshot of both retinal and coronary vessels at a single point in time, no mydriatic drops will be used. Participants will be given the option to undergo mydriatic photographs of the retina at SNEC/SERI depending on participant eye condition. For mydriatic photograph, images will be obtained after pupil dilation and graded for presence and severity of diabetic retinopathy according to the modified ETDRS system and other retinal abnormalities by trained graders.

Intervention type: DIAGNOSTIC_TEST
Intervention: Ocular Imaging
Description: The retinal photography will be acquired from macula-centre and an optic-disc centre for both left and right eye after their cardiac assessment. Patient will be required to focus at a target inside the machine for approximately 5 to 10 seconds, with a flash followed at the end when eye image is captured. Based on patients' eye conditions, additional or less images may be taken. This allows a snapshot of both retinal and coronary vessels at a single point in time, no mydriatic drops will be used. Participants will be given the option to undergo mydriatic photographs of the retina at SNEC/SERI depending on participant eye condition. For mydriatic photograph, images will be obtained after pupil dilation and graded for presence and severity of diabetic retinopathy according to the modified ETDRS system and other retinal abnormalities by trained graders.

Intervention type: OTHER
Intervention: Questionnaires
Description: 3 to 4 questionnaires will be administered (i.e. EQ5D, International Index of Erectile Function, Pittsburgh Sleep Quality Index, General Questionnaire) to investigate the correlation between clinical characteristics, lifestyle (eg. exercise, sleep, erectile dysfunction) and diet to retinal and coronary vasculature and outcomes.Only male patients who are literate in English language will be invited to complete the International Index of Erectile Function (IIEF) questionnaire. Participants have the option to not complete the whole IIEF questionnaire or some of the questions if they are not comfortable with answering those questions.

Intervention type: OTHER
Intervention: Questionnaires
Description: 3 to 4 questionnaires will be administered (i.e. EQ5D, International Index of Erectile Function, Pittsburgh Sleep Quality Index, General Questionnaire) to investigate the correlation between clinical characteristics, lifestyle (eg. exercise, sleep, erectile dysfunction) and diet to retinal and coronary vasculature and outcomes.Only male patients who are literate in English language will be invited to complete the International Index of Erectile Function (IIEF) questionnaire. Participants have the option to not complete the whole IIEF questionnaire or some of the questions if they are not comfortable with answering those questions.